Used for two eastbound transatlantic crossings in 1931 and 1934. The first was flown by Capt Holger Hoérüs with passenger Otto Hillig, of Liberty, NY, who owned it. The plane was named after the town. The destination was Copenhagen but fog forced a diversion to Germany. The second flight was by Polish brothers Bolesław and Jozef Adamowicz. NR797W remained in Poland after the flight. Photo by: Rudy Arnold / Smithsonian Institution

CV was for Romania. Also painted on the rear fuselage is number 51 - likely the CoR number. According to French publicist Michel Barrière, this aircraft used to be F-AJHZ of Air Service which took Prince Carol back to Romania in June 1930 to ascend the throne in a coup d'état, unknown to its French pilot. Certainly CV-RAC was put on display in 1932 as 'the aircraft that brought King Carol back'. Other sources give c/n 7122/12, ex F-AIZR. Photo from: Narodowe Archiwum Cyfrowe

Boeing photo. Photo from: Civil Aviation Historical Society, Melbourne, Australia

Amazing picture of the Do X beached on the island of Bubaque in then Portuguese Guinea. From here (not Cape Verde) the world's largest aircraft crossed the Atlantic to Brazil. Photo from: Koloniales Bildarchiv / Frankfurt University