The preliminary Free City of Danzig registration FD-15 is blocked, but construction number 1504 is clearly readable on the front fuselage of this airliner of the Danziger Luftreederei. The front fuselage is painted yellow and black. It does not yet carry the silver crosses of Danzig (Gdansk) on the rudder. To Dz-4 in 1921. While the Fokker-Grulich F.II version was built by Deutsche Luft-Reederei, 1504 is a Fokker c/n. Presumably due to a miscommunication it was issued to an F.III too, H-NABH. Photo from: ETH-Bibliothek Zürich

The R III light single-seater, designed by brothers Werner and Walter Rieseler, was produced mainly in Breslau (now Wrocław) by the Stahlwerk Mark conglomerate, originally a steel mill. About 50 R III aircraft are thought to have been built. This photo was taken at Devau airport in Königsberg, East Prussia (now Kaliningrad) where the Altpreussen flying school was a Mark dealer. Photo from: ETH-Bibliothek Zürich

'Landing in Köningsberg - Devau, coming from Moscow, Smolensk and Kowno [Kaunas]'. This was the first scheduled route flown by German-Soviet airline Deruluft from May 1922. Its Fokker F.IIIs had mostly been completed at the Fokker plant in Veere, Netherlands. Photo from: ETH-Bibliothek Zürich

Derived from the single-seat L59, the Albatros L60 was a two-seat sport aircraft of which three examples are known to have been built. Photo taken at the historic Königsberg - Devau airport in East Prussia during an event called Samlandküstenflug (Sambia coastal air rally). Photo from: ETH-Bibliothek Zürich

The left half of the same original as photo 348021. This Danziger Luftpost aircraft does not yet carry its Danzig Free State registration Dz-35, but the German registration has been altered with a Z within the D. The coat of arms of Danzig (now Gdansk in Poland) contains two silver crosses above each other on a red shield, so the rudder is red. Photo taken at Königsberg, then in German East Prussia, now in the Russian Kaliningrad exclave. Photo from: ETH-Bibliothek Zürich

Junkers F13 aircraft of the new Danziger Luftpost company, entered in the equally new aircraft register of the Free State of Danzig. Dz-34 (1) is ex D-145. Dz-31 is c/n 534. Photo taken at Devau airport in Köningsberg (Kaliningrad). This is the right half of the same original as photo 348106. Photo from: ETH-Bibliothek Zürich