Lot# 9085

bearing five 10 fen “Foochow” machine overprinted Silver Yuan stamps On obverse, and on reverse eight Gold Yuan stamps totaling $400,000, tied by Foochow cds. The cover was routed via Canton (1949-07-27) and Hong Kong (1949-07-29) before onward transmission to Germany. The Gold Yuan franking, at the prevailing conversion rate of $80,000 to 1 Silver Yuan fen, equals 5 fen, which together with the 50 fen basic postage On obverse makes a total of 55 fen, correctly paying the foreign airmail rate from Foochow (rate period Jul 5 to Aug 17, 1949). This cover is of particular importance for its mixed franking of “Foochow” machine overprinted Silver Yuan stamps and Gold Yuan stamps with a clearly defined conversion, fully illustrating the postal rate structure and practical operations during the concurrent circulation of dual currency systems. According to records, this is the only known example of such a combination on an international airmail cover. With clear cancellations and complete transit route, it holds significant postal history and exhibition value for the study of post-war currency transition, rate conversion, and international mail routes.