Lot# 9048

franked with five 4 fen Dr. SYS basic stamps overprinted in blue with the local post office name “Wukiachen,” tied by Shuanghechang cds and arriving Chungking on Aug 8, 1949. The total postage of 20 fen conforms to the domestic registered letter rate for the period Aug 1 to Dec 9, 1949. The adhesives bear the “Wukiachen” local overprint, yet were used at Shuanghechang, representing a cross–post office usage of locally overprinted stamps. Under normal regulations, such overprinted issues were restricted to use within the issuing post office or its designated postal district. However, following the abolition of the Gold Yuan currency in Aug 1949, these regional restrictions were lifted, rendering such overprints effectively “unnecessary overprint.” This cover clearly illustrates the transitional phase in which previously restricted local overprint stamps continued in practical use despite regulatory change. Examples combining “unnecessary overprint” status with cross-district usage are scarce, and this cover vividly documents the shift from strict regional control to freer circulation in the late Silver Yuan postal period, offering significant postal history and exhibition value.