細節
cover 1922 (22 May) "ON GOVERNMENT SERVICE" envelope, registered to Kuala Lumpur and bearing 2c., 5c. and 10c. tied by Brunei c.d.s. in black with the boxed registered h.s. at left, 5c. with broken "N" variety, 2c. with small perf. fault; reverse bears Post Office wax seals, Labuan, Singapore and Kuala Lumpur c.d.s.