OAT letter from Reykjavik 22 March 1947 to Michigan, USA. 50 aur Cod-issue and 1 Kr. Geysir bluegreen cancelled with 'REYKJAVIK - 22.III.47 17'. Onward Air Transmission stamped with large oval 'O.A.T.'. All inclusive rate up to 5 gram 150 aur (group 7b, USA) correct franking.