This K30 bomber was demonstrated abroad by Junkers' Swedish subsidiary, Flygindustri, and is seen over Madrid with lowered gun turret. The Spanish air force bought this single aircraft. Press photo published in Nuevo Mundo magazine of 4 May 1928. Photo from: Bibliothèque nationale de France - Gallica

Demonstration in Amsterdam of the military variant of the Junkers G24 airliner, which could be operated as a seaplane. Because of the restrictions imposed on Germany, the K30 was officially a product of Junkers' Swedish subsidiary, Flygindustri. Photo from: Nationaal Archief (Netherlands)

Amazing picture of two Swedish Junkers seaplanes demonstrating in Amsterdam. S-505 (a temporary civil registration) was the German-built prototype of the K30 military version - sometimes called R42 in Sweden - of the G24 airliner. S-AABB was an R53 or K53, a Junkers A35 assembled by Junkers subsidiary AB Flygindustri. S-AABB would crash into the seaplane station due to wing failure, damaging the Dutch navy's Van Berkel W-A W54 which is also seen here. The photo gives a good idea of the location of the station on the east side of Amsterdam, actually opposite Schellingwoude village. The church of Durgerdam can be seen. Photo from: Amsterdam City Archives