United States. (Trans - Pacific Mail). 1940. Air Mail envelope addressed to Medan, Sumatra bearing SG 821, 20c emerald and SG 827, 50c bight purple tied by New York duplex 'Jul 20 1940', routed via Hong Kong with Victoria/ Hong Kong transit '31st July' and 'Opened by Censor/ Hong Kong' censor label with triangular 'Passed For Transmission/ Penang/ 6' censor on face and 'Geopend Militaire Censuur' tape tied by circular 'Ned. Indisch Deviezen Instiuut/ Deviezen/ Censuur/ Medan/ 11' in carmine on face and reverse. Lovely item of censored mail sent Trans-Pacific via Hong Kong and Penang. You do not often see Triple Asian censors.