cover 1936 (Nov.) OGS envelope (240x115mm.) registered to Canada, bearing 1924-37 1c. block of four, 2c. green, 4c. orange and 5c. chocolate pairs -- the latter with one showing variety "5" retouched, all neatly cancelled with Type D8 c.d.s. and showing double-circle "POST OFFICE/BRUNEI" h.s. in lower left corner; blue registration lines cross 2c. and 5c. pairs; a scarce and unusual franking