Persian Gulf. (Bahrain - Postage Due). 1953. Air Mail envelope addressed to the United States bearing Bahrain SG 56, 3a on 3d pale violet, SG 73, 1 1/2a on 1 1/2d green and SG 76, 4a on 4d pale ultramarine (pair) tied by Bahrain double ring '7th Aug 53', underpaid with circular hand-struck 'T/ 20cts' and 'Postage Due 7 Cents' applied on arrival.
Scarce Tax hand-stamp and difficult Great Britain 'one and a half' annas green stamp on cover used in the Gulf.