cover 1913 (22 Jan.) envelope (a little crumpled), with Northern Rhodesia Police crest on flap, from Mumbwa to Windsor and redirected to Blockley, Worcs., bearing 1910-13 1d. (4, one affixed around edge of cover) tied by "MUMBWA/N.W. RHODESIA" double-ring c.d.s. showing the year most unusually in full, and with two "FOUND OPEN AND OFFICIALLY SEALED" labels at left. Very scarce. Photo