Persian Gulf. (Indian Postal Agencies in Persia). 1913. Registered India postal stationery envelope 'two annas' blue upgraded with India SG 171, 2n 6p ultramarine tied by Busrah/ Reg date stamp '7th Nov 13' with 'R 61/ Busrah' registration label, addressed to Paris with circular postmans chop and Paris receiver. Scarce item of postal stationery used in the Persian Gulf.