Editing Thai baht (section)

=== Predecimal coinage ===
[[Rama III]] (1824–1851) was the first king to consider the use of a flat coin. He did so not for the convenience of traders, but because he was disturbed that the creatures living in the cowrie shells were killed. When he learned of the use of flat copper coins in Singapore in 1835, he contacted a Scottish trader, who had two types of experimental coins struck in England. The king rejected both designs. The name of the country put on these first coins was ''Muang Thai'', not ''Siam''.<ref>{{cite web|url=http://phila09-04.eurseree.com/cgi-bin/info/agora.cgi?cart_id=5286534.107769*KJ66o8&p_id=1196&xm=on&ppinc=search2|title=1835 Rama III unadopted design copper coin "Lotus - MuangThai"|access-date=2015-10-20|archive-date=2015-12-22|archive-url=https://web.archive.org/web/20151222110629/http://phila09-04.eurseree.com/cgi-bin/info/agora.cgi?cart_id=5286534.107769*KJ66o8&p_id=1196&xm=on&ppinc=search2|url-status=live}}</ref><ref>{{cite web|url=http://www.royalthaimint.net/ewtadmin/ewt/mint_web/ewt_news.php?nid=46&filename=index|script-title=th:เงินตรา|website=Royal Thai Mint|language=th|access-date=20 October 2015|archive-url=https://web.archive.org/web/20160304103729/http://www.royalthaimint.net/ewtadmin/ewt/mint_web/ewt_news.php?nid=46&filename=index|archive-date=4 March 2016|url-status=dead}}</ref>

In 1860, modern-style coins were introduced. These were silver 1 ''sik''; 1 ''fueang''; 1 and 2 ''salueng''; 1, 2, and 4 baht; with the baht weighing 15.244&nbsp;grams and the others weight-related. Tin 1 ''solot'' and 1 ''at'' followed in 1862, with gold {{frac|2|1|2}}, 4, and 8 baht introduced in 1863 and copper 2 and 4 ''at'' in 1865. Copper replaced tin in the 1 ''solot'' and 1 ''at'' in 1874, with copper 4 at introduced in 1876. The last gold coins were struck in 1895.
[[File:Administrative Division of Rattanakosin Kingdom in 1850.jpg|thumb|453x453px|Siam at the time of coin issue 1, 2, 3, and 4 (1856-1875)]]

==== Coin timeline ====
<timeline>
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DateFormat = yyyy
Period = from:1850 till:2024
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ScaleMinor = unit:year increment:2 start:1850

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 width:20 align:left fontsize:10 shift:(5,-3) anchor:till
 barset:Rulers

 from:1850 till:1870 color:o text:"[[Thai baht#Photduang timeline|Rattanakosin Issue 7 (Rama IV)]]"
 from:1856 till:1862 color:p text:"[[Thai baht#Issue 1 – 1856 (transitional)|Issue 1 (Rama IV, transitional)]]"
 from:1860 till:1910 color:r text:"[[Thai baht#Issue 2 – 1860|Issue 2 (Rama IV)]]"
 from:1869 till:1910 color:r text:"[[Thai baht#Issue 3 – 1869|Issue 3 (Rama IV)]]"
 from:1875 till:1910 color:r text:"[[Thai baht#Issue 4 – 1875|Issue 4 (Rama V)]]"
 from:1888 till:1910 color:r text:"[[Thai baht#Issue 5 – 1888|Issue 5 (Rama V)]]"
 from:1897 till:1902 color:p text:"[[Thai baht#Issue 6 – 1897 (transitional)|Issue 6 (Rama V, transitional)]]"
 from:1908 till:1937 color:b text:"[[Thai baht#Issue 7 – 1908, 1913, 1929, 1939|Issue 7 (Rama V, VI, VII, VIII)]]"
 from:1910 till:1937 color:b text:"[[Thai baht#Issue 8 – 1913|Issue 8 (Rama VI)]]"
 from:1929 till:1937 color:b text:"[[Thai baht#Issue 9 – 1929|Issue 9 (Rama VII)]]"
 from:1937 till:1946 color:b text:"[[Thai baht#Issue 10 – 1937, 1941, 1942, 1945|Issue 10 (Rama VIII)]]"
 from:1946 till:1950 color:b text:"[[Thai baht#Issue 11 – 1946|Issue 11 (Rama VIII)]]"
 from:1950 till:1972 color:b text:"[[Thai baht#Issue 12 – 1950|Issue 12 (Rama IX)]]"
 from:1972 till:1977 color:b text:"[[Thai baht#Issue 13 – 1972|Issue 13 (Rama IX)]]"
 from:1977 till:1982 color:b text:"[[Thai baht#Issue 14 – 1977|Issue 14 (Rama IX)]]"
 from:1982 till:1987 color:b text:"[[Thai baht#Issue 15 – 1982|Issue 15 (Rama IX)]]"
 from:1987 till:2024 color:b text:"[[Thai baht#Issue 16 – 1987, 1988, 2005, 2008|Issue 16-1 (Rama IX)]]"
 from:2009 till:2024 color:b text:"[[Thai baht#Issue 16 – 2009|Issue 16-2 (Rama IX)]]"
 from:2018 till:2024 color:b text:"[[Thai baht#Issue 17 – 2018|Issue 17 (Rama X)]]"

 barset:skip
</timeline>

==== Issue 0 – 1835 (trial series) ====
During the reign of King Rama III (1824–1851), an initiative was made to introduce Thailand’s first flat coinage, intended to replace the widely used cowrie shells. To aid in this modernization of the monetary system, the king employed Robert Hunter, a Scottish merchant, to produce pattern coins.<ref>Elephant-Mueang Thai - Rama III, Thailand. Numista.com. Published 2025. Accessed May 9, 2025. <nowiki>https://en.numista.com/catalogue/pieces174244.html</nowiki></ref>

The proposed designs featured an elephant motif, which bore resemblance to the coinage of Lanka (modern-day Sri Lanka). Concerned about the symbolic inappropriateness of the elephant, which could imply foreign influence or association, King Rama III ultimately rejected all of the submitted patterns. As a result, none of the proposed coins were officially adopted or denominated.

These pattern coins, though never circulated, represent an early attempt at modernization of Siamese currency prior to the eventual adoption of machine-struck coinage in the reign of King Rama IV.
{| class="wikitable" style="text-align: center"
! colspan="9" |Issue 0 coins (Rama III) [''The Muang Thai Series'']<ref name=":1">''เหรียญกษาปณ์ไทย'' (1st ed., Vol. 1). (2019). บริษัทอมรินทร์ บุ๊ค เซ็นเตอร์ จำกัด.</ref>
|-
! colspan="2" |Image
!Value
! rowspan="2" |Dimensions<br>(mm)
! rowspan="2" |Weight<br>(g)
! rowspan="2" |Composition
! colspan="2" |Inscription, description
! rowspan="2" |Date of issue
|-
!Obverse
!Reverse
!Coinage value
!Obverse
!Reverse
|-
| rowspan="2" |[[File:No_image_available.svg|frameless|100x100px]]
| rowspan="2" |[[File:No_image_available.svg|frameless|100x100px]]
| rowspan="2" |no value
|23
| -
|Copper
| rowspan="2" |'''Elephant'''
๑๑๙๗
''(CS. 1197)''
| rowspan="2" |'''Star'''
เมืองไทย
(Thailand)
|1835
|-
|22
| -
|Silver
|1835
|-
|[[File:No_image_available.svg|frameless|100x100px]]
|[[File:No_image_available.svg|frameless|100x100px]]
|no value
|22
| -
|Silver
|'''Lotus'''
๑๑๙๗
''(CS. 1197)''
|'''Star'''
เมืองไทย
(Thailand)
|1835
|-
|[[File:No_image_available.svg|frameless|100x100px]]
|[[File:No_image_available.svg|frameless|100x100px]]
|no value
|22
| -
|Copper
|'''Lotus'''
๑๑๙๗
''(CS. 1197)''
|نڭري ''(Nagari / Land of)''
ترومن ''(Trumon)''
|1835
|-
|[[File:No_image_available.svg|frameless|100x100px]]
|[[File:No_image_available.svg|frameless|100x100px]]
|no value
|22
| -
|Copper
|'''Lotus'''
๑๑๙๗
''(CS. 1197)''
|نڭري ''(Nagari / Land of)''
ترومن ''(Trumon)''
|1835
|}

==== Issue 1 – 1856 (transitional) ====
The first issue of coins were commissioned by Rama IV, though it was never brought into circulation. This was one of the first attempt to replace the bullet coins, but few were ever minted without making it into circulation.<ref>{{Cite web |title=1 Fueang - Rama IV, Thailand |url=https://en.numista.com/catalogue/pieces176191.html |access-date=2024-03-05 |website=en.numista.com |language=en}}</ref>
{| class="wikitable" style="text-align: center"
|+Issue 1 coins (Rama IV)<ref name=":1" />
! colspan="2" |Image
! colspan="2" |Value
! rowspan="2" |Dimensions<br>(mm)
! rowspan="2" |Weight<br>(g)
! rowspan="2" |Composition
! colspan="2" |Inscription, description
! rowspan="2" |Date of issue
|-
!Obverse
!Reverse
!Name
!Coinage value
!Obverse
!Reverse
|-
| rowspan="2" |[[File:1856 1 Fuang O.png|frameless|150x150px]]
| rowspan="2" |[[File:1856 1 Fuang R.png|frameless|150x150px]]
|Fueang<br>'''เฟื้อง'''
|1 fueang,<br>1/8 baht
|15
|1.8
|Gold
|Phra Maha Mongkut seal
|กรุงเทพ ''(Krung Thep)''
| rowspan="2" |1856
|-
|Salueng<br>'''สลึง'''
|1/16 tamlueng,<br>1/4 baht
|20
|3.2
|Gold
|Phra Maha Mongkut seal
|กรุงเทพ ''(Krung Thep)''
|-
| rowspan="2" |[[File:1856 1 Saleung O.png|frameless|150x150px]]
| rowspan="2" |[[File:1856 1 Saleung R.png|frameless|150x150px]]
|Fueang<br>'''เฟื้อง'''
|1 fueang,<br>1/8 baht
|12.5
|1.85
|Silver
|Chakra ''(top)'', Phra Tao ''(middle)''<br>Phra Maha Mongkut seal ''(bottom)''
|กรุงเทพ ''(Krung Thep)''
|1856
|-
|Salueng<br>'''สลึง'''
|1/16 tamlueng,<br>1/4 baht
|16
|3.8
|Silver
|Chakra ''(top)'', Phra Tao ''(middle)''<br>Phra Maha Mongkut seal ''(bottom)''
|กรุงเทพ ''(Krung Thep)''
|1856
|}

==== Issue 2, 3 – 1860, 1869 ====
The first circulating issue of the Siamese coins. This marked the start of the move away from using ''photduang'' currency. Though in this era, the ''photduang'' were still legal tender. In this series, the lower denominations were made of silver, and the higher ones were made of gold. These higher denominations were given nicknames: ''pot dueng'', ''pit'', and ''tot''. ''Pot dueng'' means thirty two, as in 1/32 of a ''chang''. The other nickname was the ''chinkang'' or one Chinese ''tamlueng''.<ref>{{Cite web |title=2½ Baht |url=https://en.numista.com/catalogue/pieces24271.html |access-date=2024-03-05 |website=en.numista.com |language=en}}</ref> The pit means twenty, as in 1/20 of a chang, the other name is ekkang, or one thai tamlueng.<ref>{{Cite web |title=4 Baht |url=https://en.numista.com/catalogue/pieces135454.html |access-date=2024-03-05 |website=en.numista.com |language=en}}</ref> The ''tot'' means ten, as in 1/10 of a ''chang''. The coin was also called ''thukkang'', which means two ''tamlueng''.<ref>{{Cite web |title=8 Baht |url=https://en.numista.com/catalogue/pieces24453.html |access-date=2024-03-05 |website=en.numista.com |language=en}}</ref> In the lower denominations materials such as [[tin]], [[copper]] and [[brass]] are used, since these are quite low value.

According to the Thai Treasury, regarding the gold coins, they were minted during a period when large amounts of gold were entering Thailand. Inspired by the widespread use of gold coins in other countries, such as the gold coins of England, King Mongkut (Rama IV) ordered the production of gold coins for domestic use. These coins, with their higher value, facilitated trade as the silver coins in circulation at the time were of lower value. They were officially issued on October 29, 1863, and were withdrawn from use in 1908.<ref>เหรียญทองคำทศ พิศ พัดดึงส์ | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-king4-gold/</nowiki>‌</ref>

This series of coins was produced using manually operated machinery that had been presented as a royal gift by Queen Victoria of England. Due to the limited production capacity of these machines, the coins could not be minted in sufficient quantities to meet the country's demand. Consequently, their use was discontinued. This coincided with the arrival of steam-powered machinery, which allowed for more efficient and larger-scale coin production.<ref>เหรียญเงินตราพระมหามงกุฏ-พระแสงจักร (บรรณาการ) | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-king4-tribute/</nowiki>‌</ref> It is worth noting that coins of the half-fuang denomination were not mentioned in official announcements.<ref>เหรียญเงินตราพระมหามงกุฎ - พระแสงจักร | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-k4-1/</nowiki>‌</ref>

In 1866, These thin copper coins, in sik (half-fuang) and siao (quarter-fuang) denominations, were produced to replace their thicker counterparts, which were heavier and had the same value. The decision to issue lighter, thinner coins was made after an incident where King Mongkut (Rama IV) distributed the thicker coins during a charitable event, and recipients were injured with head wounds and bruises. His Majesty considered that the copper coins already bore stamped marks and inscriptions (indicating that 2 coins equaled 1 fuang and 4 coins equaled 1 fuang), making them trustworthy. Therefore, thinner and lighter coins would still serve their purpose effectively without causing harm.<ref>เหรียญทองแดงตราพระมหามงกุฎ - พระแสงจักร แบบบาง | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-k4-6/</nowiki>‌</ref>
{| class="wikitable" style="text-align: center"
! colspan="10" |Issue 2 coins (Rama IV) [''The Mongkut Series'']<ref name=":1" />
|-
! colspan="2" |Image
! colspan="2" |Value
! rowspan="2" |Dimensions<br>(mm)
! rowspan="2" |Weight<br>(g)
! rowspan="2" |Composition
! colspan="2" |Inscription, description
! rowspan="2" |Date of issue
|-
!Obverse
!Reverse
!Name
!Coinage value
!Obverse
!Reverse
|-
|[[File:1862 1 Solot O.png|frameless|150x150px]]
|[[File:1862 1 Solot R.png|frameless|150x150px]]
|Solot<br>'''โสฬส'''
|1/16 fueang,<br>1/128 baht
|23 × 2
|4
|Tin
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
+<br>สิบ หก อัน เป็น เฟื้อง<br>1/16　F.　方　片　六　十
|1862
|-
|[[File:1862 1 Att O.png|frameless|150x150px]]
|[[File:1862 1 Att R.png|frameless|150x150px]]
|At<br>'''อัฐ'''
|1/8 fueang,<br>1/64 baht
|29 × 2
|7.2
|Tin
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
+<br>แปด อัน เปน เฟื้อง<br>1/8　F.　方　片　捌
|1862
|-
|[[File:1862 1 Siao O.png|frameless|150x150px]]
|[[File:1862 1 Siao R.png|frameless|150x150px]]
|Siao<br>'''เสี้ยว'''
|1/4 fueang,<br>1/32 baht
|22 × 3
|7.55<br>3.55
|Copperฺ<br>Brass
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
+<br>สี่ อัน เปน เฟื้อง<br>1/4　F.　方　片　四
|1865
|-
|[[File:1862 1 Sik O.png|frameless|150x150px]]
|[[File:1862 1 Sik R.png|frameless|150x150px]]
|Sik<br>'''ซีก'''
|1/2 fueang,<br>1/16 baht
|29 × 3
|10~<br>7.61
|Copper<br>Brass
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
+<br>สอง อัน เปน เฟื้อง<br>1/2　F.　方　片　二
|1865
|-
| rowspan="2" |[[File:1862 0.5 Feuang O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 0.5 Feuang R.png|frameless|150x150px]]
| rowspan="2" |Half Fueang<br>'''ครึ่งเฟื้อง'''
| rowspan="2" |1/2 fueang,<br>1/16 baht
| rowspan="2" |13 × 1
|0.92
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal'''
| rowspan="2" |'''Siamese State Ensign'''
|1860
|-
|1.69
|Gold '''''[[Millesimal fineness|0.997]]'''''
|1863
|-
| rowspan="2" |[[File:1862 1 Fuang O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 1 Fuang R.png|frameless|150x150px]]
| rowspan="2" |Fueang<br>'''เฟื้อง'''
| rowspan="2" |1 fueang,<br>1/8 baht
| rowspan="2" |16 × 1
|1.84
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 1 star
| rowspan="2" |'''Siamese State Ensign''' 1 star
|1857, 1860
|-
|3.39
|Gold '''''[[Millesimal fineness|0.997]]'''''
|1863
|-
| rowspan="2" |[[File:1862 1 Salung O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 1 Salung R.png|frameless|150x150px]]
| rowspan="2" |Salueng<br>'''สลึง'''
| rowspan="2" |1/16 tamlueng,<br>1/4 baht
| rowspan="2" |22 × 1
|3.7
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 2 stars
| rowspan="2" |'''Siamese State Ensign''' 2 stars
|1857, 1860
|-
|6.82
|Gold '''''[[Millesimal fineness|0.997]]'''''
|1863
|-
| rowspan="2" |[[File:1862 2 Salung O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 2 Salung R.png|frameless|150x150px]]
| rowspan="2" |Half Baht<br>'''ครึ่งบาท'''
| rowspan="2" |1/8 tamlueng,<br>1/2 baht
| rowspan="2" |27 × 1
|7.46
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 4 stars
| rowspan="2" |'''Siamese State Ensign''' 4 stars
|1860
|-
|13.74
|Gold '''''[[Millesimal fineness|0.997]]'''''
|1863
|-
| rowspan="2" |[[File:1862 1 Baht O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 1 Baht R.png|frameless|150x150px]]
| rowspan="2" |Baht<br>'''บาท'''
| rowspan="2" |1/4 tamlueng,<br>1 baht
| rowspan="2" |31 × 1
|15.45
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 8 stars
| rowspan="2" |'''Siamese State Ensign''' 8 stars
|1857, 1860
|-
|28.47
|Gold '''''[[Millesimal fineness|0.997]]'''''
|1863
|-
| rowspan="2" |[[File:1862 2 Baht O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 2 Baht R.png|frameless|150x150px]]
| rowspan="2" |Half Tamlueng<br>'''ครึ่งตำลึง'''
| rowspan="2" |1/2 tamlueng,<br>2 baht
| rowspan="2" |37 × 2.5
|30
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 16 stars
| rowspan="2" |'''Siamese State Ensign''' 16 stars
| rowspan="2" |1863
|-
|55.29
|Gold '''''[[Millesimal fineness|0.997]]'''''
|-
| rowspan="2" |[[File:1862 2 Baht O.png|frameless|150x150px]]
''stand in image*''
| rowspan="2" |[[File:No_image_available.svg|frameless|100x100px]]
| rowspan="2" |Tamlueng<br>'''ตำลึง'''
| rowspan="2" |1 tamlueng,<br>4 baht
| rowspan="2" |45 × 4
|60
|Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''Great Mongkut Seal''' 32 stars
| rowspan="2" |'''Siamese State Ensign''' 32 stars
| rowspan="2" |1864
|-
|110
|Gold '''''[[Millesimal fineness|0.997]]'''''
|-
|[[File:1862 2.5 Baht O.png|frameless|100x100px]]
|[[File:1862 2.5 Baht R.png|frameless|126x126px]]
|Song Phai<br>'''สองไพ'''
|1/4 tamlueng,<br>1 baht
|12 × 0.8
|1.34
|Gold '''''[[Millesimal fineness|0.997]]'''''
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
|1857
|-
| rowspan="2" |[[File:1862 2.5 Baht O.png|frameless|150x150px]]
| rowspan="2" |[[File:1862 2.5 Baht R.png|frameless|150x150px]]
| rowspan="2" |Paddueng<br>'''พัดดึงส์'''
| rowspan="2" |5/8 tamlueng,<br>2.5 baht
|14 × 0.8
|1.6
|Gold '''''[[Millesimal fineness|0.997]]'''''
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
|1857
|-
|16 × 0.8
|1.83
|Gold '''''[[Millesimal fineness|0.997]]'''''
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
|1863
|-
|[[File:1862 4 Baht O.png|frameless|150x150px]]
|[[File:1862 4 Baht R.png|frameless|150x150px]]
|Pit<br>'''พิศ'''
|1 tamlueng,<br>4 baht
|17 × 1
|3.88
|Gold '''''[[Millesimal fineness|0.997]]'''''
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
|1863
|-
|[[File:1862 8 Baht O.png|frameless|150x150px]]
|[[File:1862 8 Baht R.png|frameless|150x150px]]
|Tot<br>'''ทศ'''
|2 tamlueng,<br>8 baht
|22 × 1
|7.42
|Gold '''''[[Millesimal fineness|0.997]]'''''
|'''Great Mongkut Seal'''
|'''Siamese State Ensign'''
|1863
|-
! colspan="10" |Issue 3 coins (Rama V)<ref name=":1" />
|-
|[[File:No_image_available.svg|frameless|100x100px]]
|[[File:1862 1 Solot R.png|frameless|150x150px]]
''stand in image*''
|Solot<br>'''โสฬส'''
|1/16 fueang,<br>1/128 baht
|32 × 2
|7
|Tin
|'''Great Chula Seal'''
|'''Siamese State Ensign'''
+<br>สิบ หก อัน เป็น เฟื้อง<br>1/16　F.　方　片　六　十
|1868
|-
|[[File:1869 1 Fuang R.png|frameless|150x150px]]
|[[File:1862 1 Fuang R.png|frameless|150x150px]]
|Fueang<br>'''เฟื้อง'''
|1 fueang,<br>1/8 baht
|16 × 1
|1.84
|Silver '''''[[Millesimal fineness|0.900]]'''''
|'''Great Chula Seal'''
|'''Siamese State Ensign''' 1 star
|1869
|-
|[[File:1869 1 Salung R.png|frameless|150x150px]]
|[[File:1862 1 Salung R.png|frameless|150x150px]]
|Salueng<br>'''สลึง'''
|1/16 tamlueng,<br>1/4 baht
|22 × 1
|3.7
|Silver '''''[[Millesimal fineness|0.900]]'''''
|'''Great Chula Seal'''
|'''Siamese State Ensign''' 2 stars
|1869
|-
|[[File:1869 1 Baht R.png|frameless|150x150px]]
|[[File:1862 1 Baht R.png|frameless|150x150px]]
|Baht<br>'''บาท'''
|1/4 tamlueng,<br>1 baht
|31 × 1
|15.45
|Silver '''''[[Millesimal fineness|0.900]]'''''
|'''Great Chula Seal'''
|'''Siamese State Ensign''' 8 stars
|1869
|}

==== Issue 4 – 1875 ====
The first series to depict king Rama V, the coins of this issue were made of copper, silver, and gold. Though gold was strangely only used for the 1 ''fueang'' denomination.<ref>{{Cite web |title=1 Fuang - Rama V, Thailand |url=https://en.numista.com/catalogue/pieces33330.html |access-date=2024-03-05 |website=en.numista.com |language=en}}</ref> The new shield emblem was introduced in this issue. This shield was separated into three section. Drawing from western influences, symbols within these sections represented territories Siam was controlling. The [[Airavata|tree-headed elephant]] represented [[Rattanakosin Kingdom (1782–1932)|Siamese territory]], the bottom-left [[White elephant (animal)|elephant]] represented [[Lan Xang]], and the [[Kris|warangka]] represented Siamese Malaya.

Due to a malfunction in the minting machinery at the government mint, which prevented the production of circulating coinage, King Chulalongkorn ordered the design of this coin series and commissioned its production by a mint in Birmingham, England. This marked the first time that coins were minted abroad for circulation in Siam.<ref>เหรียญทองแดงตรา จ.ป.ร. - ช่อชัยพฤกษ์ | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-k5-2/</nowiki>

‌</ref> The copper coins in this issue were made in the same size as the coins of the United Kingdom, with the Solot being the same size as the [[Farthing (British coin)|Farthing]], the Att being the same size as the [[Halfpenny (British pre-decimal coin)|Half-Penny]], and the Siao being the same size as the [[Penny (British pre-decimal coin)|Penny]]. The silver coins differ in size to the British counterpart due to the baht being pegged to a different unit of silver. The copper coin in this case were base metal and were not pegged to any standard metal, hence their size tend to differ more throughout history. These copper coins only represent a certain amount of silver.

These silver coins were minted when the Sathit Kuang machinery was put into use in 1889 at the Sathit Kuang Coin Mint, marking the beginning of a new coinage system. The year markings started to appear on the coins from R.S. 120 (1898) onwards.<ref>เหรียญเงิน พระบรมรูป - ตราแผ่นดิน | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-k5-5/</nowiki>

‌</ref>
{| class="wikitable" style="width:100%; text-align: center"
! colspan="11" |Issue 4 coins (Rama V) [''The C.P.R. Series'']<ref name=":1" />
|-
! colspan="2" |Image
! colspan="2" |Value
! rowspan="2" |Dimensions<br>(mm)
! rowspan="2" |Weight<br>(g)
! rowspan="2" |Mintage
! rowspan="2" |Composition
! colspan="2" |Inscription, description
! rowspan="2" |Date of issue
|-
!Obverse
!Reverse
!Name
!Coinage value
!Obverse
!Reverse
|-
|[[File:1876 1 Solot O.png|frameless|150x150px]]
|[[File:1876 1 Solot R.png|frameless|150x150px]]
|Solot<br>'''โสฬส'''
|1/16 fueang,<br>1/128 baht
|20 × 1
|2.67
|'''2.56 million'''
|Copper
|กรุงสยาม ''(Kingdom of Siam)''<br>'''Monogram of [[Chulalongkorn|Rama V]]'''<br>รัชกาลที่ ๕ ''(5th Reign)''
|'''[[Cassia javanica|Java Cassia Wreath]]'''
+

โสลด ''(Solot)'' ๑๖ ''(16)'' อันเฟื้อง ''(makes a fuang)''

๑๒๓๖ ''(CS 1236)''
|1875
|-
|[[File:1876 1 Att O.png|frameless|150x150px]]
|[[File:1876 1 Att R.png|frameless|150x150px]]
|At<br>'''อัฐ'''
|1/8 fueang,<br>1/64 baht
|25 × 1
|5.58
|'''15.3 million'''
|Copper
|กรุงสยาม ''(Kingdom of Siam)''<br>'''Monogram of [[Chulalongkorn|Rama V]]'''<br>รัชกาลที่ ๕ ''(5th Reign)''
|'''[[Cassia javanica|Java Cassia Wreath]]'''
+

อัฐ ''(At)'' ๘ ''(8)'' อันเฟื้อง ''(makes a fuang)''

๑๒๓๖ ''(CS 1236)''
|1875
|-
|[[File:1876 1 Siao O.png|frameless|150x150px]]
|[[File:1876 1 Siao R.png|frameless|150x150px]]
|Siao<br>'''เสี้ยว'''
|1/4 fueang,<br>1/32 baht
|30.5 × 2
|11.14
|'''10.2 million'''
|Copper
|กรุงสยาม ''(Kingdom of Siam)''<br>'''Monogram of [[Chulalongkorn|Rama V]]'''<br>รัชกาลที่ ๕ ''(5th Reign)''
|'''[[Cassia javanica|Java Cassia Wreath]]'''
+

เสี้ยว ''(Siao)'' ๔ ''(4)'' อันเฟื้อง ''(makes a fuang)''

๑๒๓๖ ''(CS 1236)''
|1875
|-
|[[File:1876 1 Sik O.png|frameless|150x150px]]
|[[File:1876 1 Sik R.png|frameless|150x150px]]
|Sik<br>'''ซีก'''
|1/2 fueang,<br>1/16 baht
|38.5 × 2.5
|22.57
|'''unknown'''
|Copper
|กรุงสยาม ''(Kingdom of Siam)''<br>'''Monogram of [[Chulalongkorn|Rama V]]'''<br>รัชกาลที่ ๕ ''(5th Reign)''
|'''[[Cassia javanica|Java Cassia Wreath]]'''
+

สิ้ก ''(Sik)'' ๒ ''(2)'' อันเฟื้อง ''(makes a fuang)''

๑๒๓๘ ''(CS 1238)''
|1875
|-
| rowspan="4" |[[File:1876 1 Feuang O.png|frameless|150x150px]]
| rowspan="4" |[[File:1876 1 Feuang R.png|frameless|150x150px]]
| rowspan="4" |Fueang<br>'''เฟื้อง'''
| rowspan="4" |1 fueang,<br>1/8 baht
| rowspan="2" |16 × 0.5
| rowspan="2" |1.87
|'''unknown'''
| rowspan="2" |Gold '''''[[Millesimal fineness|0.997]]'''''
| rowspan="4" |'''[[Chulalongkorn|Rama V's Portrait]]'''
+
สมเด็จพระปรมินทรมหาจุฬาลงกรณ์<br>''(His Majesty King Chulalongkorn)''<br>พระจุลจอมเกล้าเจ้าอยู่หัว<br>''(King Chula Chomklao)''
|'''[[Emblem of Thailand|Siamese State Seal]]'''
+

กรุงสยาม ''(Siam)''<br>รัชกาลที่๕ ''(5th Reign)''<br>เฟื้องหนึ่ง ''(1 fueang)''
| rowspan="2" |1876-1910
|-
|'''unknown'''
|๑๒๐
''(RS. 120)''
|-
| rowspan="2" |16 × 0.9
| rowspan="2" |1.95
|'''7.41 million'''
| rowspan="2" |Silver '''''[[Millesimal fineness|0.900]]'''''
|'''[[Emblem of Thailand|Siamese State Seal]]'''
+

กรุงสยาม ''(Siam)''<br>รัชกาลที่๕ ''(5th Reign)''<br>เฟื้องหนึ่ง ''(1 fueang)''
|1875
|-
|'''3.8 million'''
''(dated)''
|๑๒๐
''(RS. 120)''
|1901-1908
|-
| rowspan="2" |[[File:1876 1 Salung O'.png|frameless|150x150px]]
| rowspan="2" |[[File:1876 1 Salung R.png|frameless|150x150px]]
| rowspan="2" |Salueng<br>'''สลึง'''
| rowspan="2" |1/16 tamlueng,<br>1/4 baht
| rowspan="2" |20.5 × 1.0
| rowspan="2" |3.75
|'''6.08 million'''
| rowspan="2" |Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''[[Chulalongkorn|Rama V's Portrait]]'''
+
สมเด็จพระปรมินทรมหาจุฬาลงกรณ์<br>''(His Majesty King Chulalongkorn)''<br>พระจุลจอมเกล้าเจ้าอยู่หัว<br>''(King Chulalongkorn)''
|'''[[Emblem of Thailand|Siamese State Seal]]'''
+

กรุงสยาม ''(Siam)''<br>รัชกาลที่๕ ''(5th Reign)''<br>สลึงหนึ่ง ''(1 salueng)''
|1875
|-
|'''2.46 million'''
''(dated)''
|๑๒๐
''(RS. 120)''
|1901-1908
|-
| rowspan="2" |[[File:1876 1 Baht O.png|frameless|150x150px]]
| rowspan="2" |[[File:1876 1 Baht R.png|frameless|150x150px]]
| rowspan="2" |Baht<br>'''บาท'''
| rowspan="2" |1/4 tamlueng,<br>1 baht
| rowspan="2" |31 × 2.0
| rowspan="2" |15.1
|'''68.5 million'''
| rowspan="2" |Silver '''''[[Millesimal fineness|0.900]]'''''
| rowspan="2" |'''[[Chulalongkorn|Rama V's Portrait]]'''
+
สมเด็จพระปรมินทรมหาจุฬาลงกรณ์<br>''(His Majesty King Chulalongkorn)''<br>พระจุลจอมเกล้าเจ้าอยู่หัว<br>''(King Chulalongkorn)''
|'''[[Emblem of Thailand|Siamese State Seal]]'''
+

กรุงสยาม ''(Siam)''<br>รัชกาลที่๕ ''(5th Reign)''<br>บาทหนึ่ง ''(1 baht)''
|1875
|-
|'''59.1 million'''
''(dated)''
|๑๒๐
''(RS. 120)''
|1901-1908
|}

==== Issue 5 – 1888 ====
[[File:Administrative Division of Rattanakosin Kingdom in 1882.jpg|thumb|Siam at the time of coin issue 5 (1888)]]
This was a minor issue, in which the lesser denominations' designs were updated to incorporate the three-parted{{clarify|date=April 2025}} shield into the design. This copper coin was produced to replace previous versions and was minted in England, with additional production by the Royal Mint of Thailand.<ref>เหรียญทองแดง พระบรมรูป - ตราพระสยามเทวาธิราช | กรมธนารักษ์. กรมธนารักษ์ : The Treasury Department. Published 2024. Accessed December 20, 2024. <nowiki>https://www.treasury.go.th/th/coin-k5-3/</nowiki>‌</ref> In this issue, depending on where the coin was minted, the minting alignment was different. This means that in this specific series, the alignment will show at which mint the coin was minted.<ref>1 Siao / 2 Att - Rama V, Thailand. Numista.com. Published 2024. Accessed December 31, 2024. <nowiki>https://en.numista.com/catalogue/pieces11037.html</nowiki>‌</ref> For example, in this series there were four mints which contributed to the minting: Royal Mint of Belgium, Bangkok Mint, Heaton and Sons (Burmingham Mint), and Hamburgische Münze. For the 1 Solot coin, the coin minted in the year R.S. 109{{clarify|date=April 2025}} was medal aligned and was minted in the Birmingham Mint, but R.S. 118 coins were minted in Hamburg had coin alignement.<ref>1 Solot / {{frac|1|16}}} Fueang / {{frac|1|2}} Att - Rama V, Thailand. Numista.com. Published 2024. Accessed December 31, 2024. <nowiki>https://en.numista.com/catalogue/pieces13246.html</nowiki>‌</ref>
[[File:Minting alignment thai coin example.jpg|center|frameless|433x433px]]
{| class="wikitable" style="text-align: center"
! colspan="10" |Issue 5 coins (Rama V) [''The Siam Devadhiraj Series'']<ref name=":1" />
|-
! colspan="2" |Image
! colspan="2" |Value
! rowspan="2" |Dimensions<br>(mm)
! rowspan="2" |Weight<br>(g)
! rowspan="2" |Composition
! colspan="2" |Inscription, description
! rowspan="2" |Date of issue
|-
!Obverse
!Reverse
!Name
!Coinage value
!Obverse
!Reverse
|-
|[[File:1888 1 Solot O.png|frameless|150x150px]]
|[[File:1888 1 Solot R.png|frameless|150x150px]]
|Solot<br>'''โสฬส'''
|1/16 fueang,<br>1/128 baht
|19 × 2
|2.8
|Copper
|'''[[Chulalongkorn|Rama V's Portrait]]'''
+
จุฬาลงกรณ์ ป.ร.<br>''(Chulalongkorn Rex)''<br>พระจุลจอมเกล้าเจ้ากรุงสยาม<br>''(King Chula Chomklao of Siam)''
|[[Siam Devadhiraj|'''Guardian Deity of Siam's Portrait''']]
+

หนึ่งโสฬศ ''(1 solot)''<br>๑๑๘ ''(RS 118)''
|1887
|-
|[[File:1888 1 Att O.png|frameless|150x150px]]
|[[File:1888 1 Att R.png|frameless|150x150px]]
|At<br>'''อัฐ'''
|1/8 fueang,<br>1/64 baht
|24 × 2
|5.8
|Copper
|'''[[Chulalongkorn|Rama V's Portrait]]'''
+
จุฬาลงกรณ์ ป.ร.<br>''(Chulalongkorn Rex)''<br>พระจุลจอมเกล้าเจ้ากรุงสยาม<br>''(King Chula Chomklao of Siam)''
|[[Siam Devadhiraj|'''Guardian Deity of Siam's Portrait''']]
+

หนึ่งอัฐ ''(1 at)''<br>๑๒๒ ''(RS 122)''
|1888
|-
|[[File:1888 1 Siao O.png|frameless|150x150px]]
|[[File:1888 1 Siao R.png|frameless|150x150px]]
|Siao<br>'''เสี้ยว'''
|1/4 fueang,<br>1/32 baht
|30 × 2
|11.3
|Copper
|'''[[Chulalongkorn|Rama V's Portrait]]'''
+
จุฬาลงกรณ์ ป.ร.<br>''(Chulalongkorn Rex)''<br>พระจุลจอมเกล้าเจ้ากรุงสยาม<br>''(King Chula Chomklao of Siam)''
|[[Siam Devadhiraj|'''Guardian Deity of Siam's Portrait''']]
+

หนึ่งเซียว ''(1 siao)''<br>๑๒๒ ''(RS 122)''
|1888
|}