Few words on the subject…
As we all know, the He 112 was a losing contender to Messerschmitt's Bf 109 in a competition for Luftwaffe's new modern fighter aircraft. Despite the setback, Heinkel continued the work on his aircraft. After a number of prototypes and unsuccessful He 112A series, the He 112B series emerged as an upgraded and completely redesigned version. Heinkel hoped that Luftwaffe might show new interest for his fighter, but this was not to be. A number of these aircraft were tested in operational conditions in Spanish civil war however, and the type was authorized for export. It was used in small numbers by the Air Forces of Spain, Japan, Hungary and Romania.
He 112B-0 did have a short lived service with the Luftwaffe though. During the Sudeten crisis in fall of 1938 twelve aircraft from Japanese order were hurriedly pressed into service. The machines were delivered to III/JG 132 at Fürstenwalde, but fallowing the signing of Munich agreement, the fighters were returned to Heinkel for export once again. Heinkel He 112B-0 was armed with two 20mm cannons in the wings and two 7,9mm machine-guns in the fuselage. Equipped with Jumo 210C engine, the aircraft had max. speed od 510km/h, range of 1150km and ceiling of 9500m.