5c carmine rose 'San Martin' postal stationery envelope (H&G B46) used with added 1939 4c green and 10c maroon, 1945 30c brown & yellow brown and 40c purple & mauve and 1945 5c carmine red (SG 673, 674a, 757/758 & 773) all tied by multiple strikes of USHUAIA T.F. cds dated 13 MAR 1950. Sent airmail to USA.