1942 CHINA REGISTERED AIRMAIL DOUBLE RATE to USA, a nice $24.40 franking pays the $23.40 double airmail rate comprising a normal 1 ounce UPU $1.00 surface rate and 4 x $5.60 per ¼ ounce airmail surcharge + $1.00 registration fee, on cover from USA Ambassador C. E. Gauss at CHUNGKING and addressed to WASHINGTON-DC with arrival JUN 10th, routing via China Airways to CALCUTTA + BOAC to LAGOS + Pan-Am Clipper to NATAL & MIAMI + CAM to Washington, a scarce rate, F-VF est ($50+ US) (Image)

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