Offices in China, 1919, 40¢ on 20¢ deep ultramarine. Attractive centering, tied by bold "U.S. Postal Agency, Shanghai, China, R.D." oval handstamp on registered return receipt cover to Greenville, Ill., reverse with purple "Postal Agency, Shanghai, China, Aug 17, 1922" cds, Chicago, Ill transit and receiving postmarks, with original Shanghai postmarked registry receipt, Very Fine, ex Twigg Smith. Scott No. K13  Estimate $2,000 - 2,500. $0 (Image)