China. (Yunnan). 1941. Air Mail envelope addressed to England bearing SG 475, $5 deep green and scarlet and SG 589, 10c emerald tied by Kunming date stamp '26th Dec 41' endorsed 'By British Overseas Airways via Durban' with 'Passed X Censor/ Rangoon' on face in green. Nice item paying the $5. 10c rate CNAC to Calcutta and BOAC to Durban.
The cover went CNAC to Calcutta and B.O.A.C. horseshoe route via Durban and Egypt then surface to Europe.