China, 1941, Thrift Movement souvenir sheet, on Exhibition cover (Chan MS1 var.), overprinted for the Russian Philatelic Society Exhibition in Shanghai on February 28, 1943, with pair of 2c Martyrs; tied by commemorative double-ring datestamp on unaddressed envelope, plus Shanghai bilingual datestamps of Feb 28 (the day of the Exhibition; dotted-rimmed) and Mar. 1, Fine to Very Fine, a rare souvenir usage. Est. HK$2,400-3,000 (Image1)

Est. HK$2,400-3,000