The Army Air Corps received, between 1929 and 1932, a total of 366 P-12s produced in 6 basic models: P-12 and series -B through -F. The P-12 was developed by Boeing, at their own expense, as the Model 89. The P-12 was also flown by the Navy as the F4B. Boeing used experienced gained during the construction of the XP-9, to develop a semi-monocoque all-metal fuselage version of the P-12 (Boeing Model 218). The Model 218 was tested with the designation XP-925 and resulted in an order for 135 more P-12s (-E and -F models).

SPECIFICATIONS (P-12E)
Length: 20 ft. 4 in.
Span: 30 ft. 0 in.
Height: 9 ft. 0 in.
Engine: Pratt & Whitney R-1340-17 of 500 hp.
Armament: Two .30-cal. machine guns or one .30-cal. and one .50-cal.; 244 lbs of bombs carried externally.
Maximum speed: 189 mph
Cruising speed: 160 mph
Range: 570 miles
Maximum weight: 2,690 lbs