Airmail cover franked with 1945 2 x 10c maroon, 30c brown & yellow brown and 4 x 1945 5c carmine (SG 753, 757 & 773) all tied by multiple strikes of OBERA - MI cds's dated 29 MAY 1950. Addressed to SWITZERLAND. Obera was a Swiss settlement established in 1897 in the Misiones department.