Set of two Poland 1970 “Polska Na Morzu 1939–1945” naval postage stamps, Scott #1760–1761.
The set includes GR 40 and GR 60 denominations with perforated edges, maritime imagery, Polish inscriptions, and visible cancellation marks.
The reverse shows discoloration and apparent adhesive or hinge residue.
Good pre-owned condition with cancellation marks visible.