Ship Post Mars: 1915, Austrian Navy - col8589-1: "Attractive vintage postcard from Pola ( Liceo building ).
The postcard has been sent by a marine from the S. M. Ship "Mars" - red cancellation S.M. Schiff "Mars". Black strike: " K.u.K. Marine Postamt Pola 13. VII. 15 ) ." @ rubylane