cover India ½a. envelope to Bombay, cancelled by superb "B" in bars and with Muscat c.d.s. on reverse, and two unstamped envelopes to Bombay, each showing "MUSKÁT" c.d.s. and Postage Due h.s. on reverse

Details
cover India ½a. envelope to Bombay, cancelled by superb "B" in bars and with Muscat c.d.s. on reverse, and two unstamped envelopes to Bombay, each showing "MUSKÁT" c.d.s. and Postage Due h.s. on reverse