1 XBT-12 officially accepted in May 1941, serial 39-719 contract AC-12728 dated 21 June 1939
24 BT-12, first accepted in December 1942 then the remainder May to September 1943, serials 42-3684 to 3707. Contract AC-20857 dated 8 October 1941, originally for 200 aircraft (42-3684 to 3883).
2 XL-15 officially accepted in April 1948, serials 46-520 and 521 contract AC-15054 dated 21 November 1947.
10 YL-15 accepted December 1948 to March 1949, serials 47-423 to 432. Contract PR-19645 dated 1 December 1948, originally for 57 aircraft (47-423 to 479)