1876 letter from Sweden, Gefle 15.11.1876, by ship mail via Hanko to Tammisaari. Very rare postmark used in the ship on letter: FINSKA ÅNGB. POSTEXPEDITION 18.11.1876. Approximately four such postmarks are known! The postmark was in use only during the 1876 sailing season. Rarity! Ex Johan Snellman (Image)