Lot# 9046

franked on reverse with three 10 fen Silver Yuan surcharged revenue stamps (on Dah Tung flat plate issue), total 30 fen, each overprinted with black Sung-style “Ipin” post office name chop, tied by Ipin cds dated 49.7.29. The postage correctly pays the foreign aerogramme rate of 30 fen (valid from July 5 to Dec 11, 1949) . The franking comprises San Yi Printing Press Silver Yuan surcharges in red-brown on revenue stamps, further overprinted with the local post office name “Ipin,” representing a characteristic example of local overprint practice during the Silver Yuan postal period, reflecting the diversified stamp supply and regional postal control measures of the time. A long-distance airmail usage from inland Szechwan to Northern Europe, illustrating the functioning of international postal routes in the late 1949 transitional period. According to recorded data, this is the only known foreign aerogramme sent from a Szechwan local post office, an exceptional rarity of considerable importance for the study of Silver Yuan postal operations, local overprint system, and outbound postal history, and of significant exhibition value. Accompanied by a 2008 Experts & Consultants Limited certificate.