China. (Horseshoe Route). 1943. Registered Air Mail envelope written from Shan Sheusi addressed to London bearing SG 632a, 30c brown, SG 638a, $2 blue-green (2) and SG 641a, $5 carmine tied by Siking date stamp with registered label on reverse, endorsed 'By B.O.A.C. to Egypt/ onward by Surface transport' with Pahsien transit in reverse, routed via India and Egypt with 'Opened by Examiner/ 721' censor tape.
Nice item paying the double letter rate of $4, plus air letter $5 and thirty cents registration fee, carried C.N.AC. to Calcutta and horseshoe route to Durban and Cairo and surface mail to Europe.