sentences:  The four remaining prototypes were completed during the spring and early summer of 1938, the V5 and V6 being A-series production prototypes for the reconnaissance model, and the V7 and V8 being B-series production prototypes for the bomber model.These four aircraft were three-seaters with a defensive armament of one MG 15 machine gun in a dorsal position, V7 and V8 having provision for a normal bombload of three 250 kg (551 lb) bombs or maximum bombload of 1,000 kg (2,205 lb).V7 and V8 were sold to Japan in May 1940, and extensively studied; the insights thus gained were used in the design of the Yokosuka R2Y.