1944 Chungking, China to Washington D.C., diplomatic mail cover franked with China 1943, $4 blue on reverse and tied by boxed "Embassy of the United States of America, Sep 6 - 1944, Chungking" handstamp, with "C.E. Gauss, American Ambassador" signature endorsement above, front addressed to Gen. George C. Marshall and franked with 2¢ Defence pair tied by Washington D.C. machine postmark, Very Fine, sent by air by diplomatic pouch. Scott Nos. 900  Estimate $150 - 200. $0 (Image)