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Negotiations had been underway since February 1935 about the licensed production of Heinkel aircraft for the secret development of the Hungarian air force, which was planned at the time. Heinkel built on relationships that had existed for years, because more than 40 Heinkel HD 22s had been built in Hungary since 1928. The idea was to produce the He 51, He 70 and He 111 with WM K-14 engines under license. In 1936, Hungary ordered 18 He 70s as long-range reconnaissance aircraft, which were to be equipped with the Gnome et Rhone K-14 radial engine built under license in Hungary by the Manfred Weiss company. The aircraft are also referred to in the literature as the He 170. In the factory flight operations, only the He 70 Hungary* was mentioned. It seems so. as if the Heinkel version of the He 70, which had been planned to be more powerful by installing a more powerful engine, was initially called the He 170. This is supported by a short report in issue 22/1937 of the magazine .Flugsport*, where data for a He 170 with a DB 600 C engine is presented. The photo published with it, however, shows the G-ADZF delivered to England. The first machine for Hungary was the serial number 2171 (D-OASA), which the Heinkel pilot Kurt Heinrich first flew on May 11, 1937. Known serial number blocks of the machines delivered to Hungary are 2171 to 2175 and 2228 to 2239. Delivery took place by air between September 1937 and February 1938. The machines were initially given civil registrations HA-HTA to HA-HTS. With the military registration numbers F.401 to 418 (F stood for Felderitö - reconnaissance), they were then put into service with the two long-range reconnaissance squadrons 1 1 in Budaörs and 1/2 in Kecskemet. The aircraft took part in the fight against Yugoslavia and the Soviet Union but were soon withdrawn from front-line service. They then flew as training aircraft and for target towing until the end of the war.