Air Mail cover A collection of commmercial flown covers to U.S.A., mostly from the period 1940-41, with some censor marks and several registered with Hong Kong (52), some better frankings include 1921-27 values to $2 (8), $3 and $5, K.G.VI definitives and commemoratives with markings including boxed "NOT OPENED/BY/CENSOR" in green-blue and "RETURNED FOR POSTAGE/POSTAGE DUE CENTS", Macau (40), China (82) including cancelled by U.S. Sea Post Office (4) and some with flight instructions endorsed on the front, plus some others

Details
Air Mail cover A collection of commmercial flown covers to U.S.A., mostly from the period 1940-41, with some censor marks and several registered with Hong Kong (52), some better frankings include 1921-27 values to $2 (8), $3 and $5, K.G.VI definitives and commemoratives with markings including boxed "NOT OPENED/BY/CENSOR" in green-blue and "RETURNED FOR POSTAGE/POSTAGE DUE CENTS", Macau (40), China (82) including cancelled by U.S. Sea Post Office (4) and some with flight instructions endorsed on the front, plus some others