German coaster ALLEGRO (IMO 5224247) built at Schiffswerft Gustav Wolkau, Hamburg-Wilhelmsburg, as MARIE-URSULA (yard № 1083, launched: 04-1939, completed: 29-11-1939), lengthened 1951, photo by J. Robert Boman (1926–2002), copyright owned by Sjöhistoriska museet.
Boman, J. Robert / Sjöhistoriska museet
CC BY-SA 4.0
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