Photo taken at the former Martin plant in Middle River, MD (now Baltimore - Martin State airport), possibly on the day of its first flight in late November 1937.

Large flying boat, rejected by Pan Am in favour of the Boeing 314. Nicknamed 'Russian Clipper', the sole example was delivered to Leningrad by ship. Re-assembled there by July 1938. The Soviets bought a license to build the type as a bomber, but this came to naught and this prototype, designated PS-30, became CCCP-L2940 in Aeroflot's Far East division to for use on the Khabarovsk - Petropavlovsk route. It was scrapped in July 1946. Photo by: Rudy Arnold / Smithsonian Institution