'S-42 Pan American Clipper in Apra Harbor after 4th Pan American Survey Flight arrived in Guam.' Photo from: Pan American Airways

'First Atlantic survey flight to Lisbon.' Another shot confirms the registration. NC16736 wore the name Pan American Clipper III just a month earlier. Photo probably taken off Alverca which handled seaplanes until 1938 when the Aeroporto Marítimo de Cabo Ruivo was established near the new landplane airport at Portela. Photo from: University of Miami

Overflying the under-construction San Francisco-Oakland Bay Bridge, which is not the Golden Gate Bridge. San Francisco is the closest US west coast city to Hawaii and Pan Am's Pacific flying boat terminal was to be built on artificial Treasure Island, to the left of Yerba Buena Island, in the background. The S-42 had insufficient range to start transoceanic services but Pan American Clipper was used for experimental Pacific flights, hence the NR registration. Photo by: Clyde Sunderland / California State Library

Built May 1945 as C-54E 44-9121. Converted by Douglas that year to DC-4 standard. Bought by PAWA on 17 December 1945 and operated in America and Europe until sale to the Spanish A.F. as T4-7 in 1962. From Pan Am 60 years ago.