cover PERSIAN GULF: 1947 (Dec.) and 1948 (Jan.) envelopes from the same correspondence to Bombay and franked at 2½a. and 4½a. respectively, both cancelled by "DUBAI/PERSIAN GULF" double-ring c.d.s. Also 1949 envelope registered to Muscat bearing 4a. and 8a. cancelled with "GUADUR" double-ring c.d.s.