How old were the actors in Främmande hamn (1948)?

A Swedish cargo ship is in the winter of 1938 at the dock in Gdynia in Poland, waiting to depart with coal to Sweden. In a tavern in the port a Polish dockworkers tries to tell something to the Swedish sailors, but is rudely turned away by the tavern owner. Later in the evening the port worker is found dead. That same evening one of the Swedish sailors, meets a Jewish woman who has fled Nazi Germany.