Paquebot Cover 1971 – Gothenburg
Under the UPU regulations, letters and cards posted at sea should be affixed with the postage stamps of the country under which the vessel is registered. the Postal rates of such country shall apply. If the vessel is at a port when the postcard or letter is handed over it is required to be affixed with stamps of the country in whose waters the vessel is docked. Though not stated in practice, letters with stamps of the country of last port of call are also accepted.
A Paquebot cover posted at Sea with GB stamp postmarked and cancelled at Goteberg or Gothenburg a Swedish seaport on 13 Sep 1971. The cover was to be delivered in England.
Stamp Digest 