The second production Ju 52 (fourth aircraft constructed) was used for trialling the aircraft for military applications.
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The first production aircraft languished at Junkers without a buyer, but the second was acquired by the paramilitary German Air Transport School (DVS), and fitted with floats. Work had already begun on a multi-engined Ju 52, and this aircraft was fitted with the enlarged rudder that would become the definitive Ju 52/3m rudder.
In December 1932 the aircraft was transferred to Junkers' Swedish subsidiary AB Flygindustri and given a Swedish registration. Modifications were made to the aircraft to convert it to a torpedo bomber as the Junkers K.45c.
In 1936 the aircraft was reurned to Germany where it joined the target tug squadron based in Kiel-Holtenau.