IIOE-1 Legacy: The special cover released in 1963 during IIOE expedition by US program in Biology

IIOE-1 Legacy: The special cover released in 1963 during IIOE expedition by US program in Biology to send a correspondence to Mr. William Littlewood, science attached to American Embassy in Stockholm, Sweden from R/V Anton Bruun which was conducting survey in the Indian Ocean and was at Mumbai (then Bombay) port . The official seal of R/V Aton Bruun can also been seen on this envelop.