Persian Gulf. (Kuwait). 1960. Registered Air Mail Kuwait postal stationery envelope 40n.p. turquoise upgraded with 10n.p. claret, 15n.p. brown (3) and 25n.p. orange tied by bilingual oval 'Ahmadi-Kuwait Regd oval '17th May 1960' with matching registration label addressed to London, England. Superb uprated postal stationery.