Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1514:
1936-39, Trans-Pacific MV ”Heian Maru”, three covers, one to Canada, two to US, franked by three or four stamps, cancelled by similar red brown illustrated date stamps, four or three-character markings in gray blue (”To Canada” or ”To US”), opening notes on reverse, VF, Est. $400-$500
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