Hong Kong. (India). 1940. Air Mail envelope written from Calcutta addressed to Philadelphia bearing India SG 247, 3p slate (2), SG 250, 1a carmine, SG 255, 4a brown, SG 256, 6a turquoise and SG 259, 1r brown and slate (2) tied by Calcutta double ring, endorsed 'via India-Hong Kong- USA' with 'Opened Censor' label with framed 'Not Opened/Censor' cachet routed via Hong Kong with 'Passed censor / Hong Kong /9' on face in green. Very fine.