Swinemunde - now it is ŚWINOUJŚCIE (the port town on the coast of Baltic Sea - Morze Bałtyckie)
and on the map of Poland:http://www.pilot.pl/index.php3?z_city_id=140&max_katalog...
Świnoujście is in ZACHODNIOPOMORSKIE Province (województwo Zachodniopomorskie), former this was SZCECIŃSKIE Province (Szczecin - the big town)
If you want to watch this town on the old postcards - see this website:http://www.filokarta.pl/auction/auctions.jsp?mode=auctionsby...
There are internet auctions of the olds postcards. You may to buy some postcards - 1 $ = 3 PLN circa (3 Złote Polskie) or to watch only... :)