Editing Martin B-10 (section)

=== Martin Model 123 ===
Private venture of Martin company, predecessor of the XB-10, served as prototype for the series, one built.<ref name="fitz45">Fitzsimons 1967/1969, p. 1845.</ref>
;XB-907
:US Army designation for the Model 123 in evaluation,<ref name="fitz45"/> with open cockpits and two Wright SR-1820-E, delivered April 1932.
;XB-907A
:Modified XB-907 after Martin returned it to U.S. Army for further operational trials,<ref name="fitz46"/> with larger wingspan and two Wright R-1820-19.
;XB-10
:Designation of the prototype when purchased by the United States Army Air Corps, Modified XB-907A with enclosed cockpits and turret and single strut landing gear.<ref name="world1"/><ref>[http://www.10af.afrc.af.mil/shared/media/photodb/photos/060511-F-1234S-003.jpg "Photo of XB-10."] {{webarchive|url=https://web.archive.org/web/20110722180510/http://www.10af.afrc.af.mil/shared/media/photodb/photos/060511-F-1234S-003.jpg|date=2011-06-22}} ''10af.afrc.af.mil.'' Retrieved: 17 July 2011.</ref>