Bahrain: circa 1938 large registered airmail cover to England franked with pair of 1a, block of 14, block of 4 and a single 4a and 3a6p overprinted KGV India stamps tied by dispatch datestamps and a BAHRAIN / PERSIAN GULF DISTRICT handstamp over registration label. Reverse B.P.C. LTD. BAHRAIN (British Petroleum) wax seals.
