1946 (Dec 1) Stampless registered cover from Kuala Belait to Rangoon bearing a provisional "R. BELAIT" registration label on pink paper, postage paid in cash with a red boxed Chinese handstamp applied, backstamped at Kuala Belait and Brunei. Redirected within Burma, finally returned with Rangoon and Calcutta Dead Letter Office slips attached to the front. Backstamped with boxed "INCONNU", five Burma datestamps, boxed "D.L.O / RANGOON / FREE" (2) and "D.L.O / CALCUTTA" (2) and datestamps of Singapore and Kuala Belait (30 MY 47). Overall age toning, otherwise fine and very unusual.