This block of four stamps, issued on October 9, 1948, during a period of extreme hyperinflation in post-war China, belongs to the “Imprint the New Value in Gold Currency” series. The original 200 cent Sun Yat-sen stamp, printed in grey-brown, was overprinted with the new denomination of 500 yuan (圓) in black, reflecting the rapid devaluation of the Chinese Nationalist currency. The overprint includes traditional Chinese characters rendered in a vertical format, consistent across all four stamps in the block. The design depicts Dr. Sun Yat-sen (1866–1925), widely regarded as the “Father of the Nation,” framed by elaborate engraving that reinforces his centrality to modern Chinese identity. These stamps were printed via typography by both Chung Hwa Book Co. and San Yi Printing Co. (O), with a comb perforation of 12½. The paper is unwatermarked and, as typical for many emergency issues of this period, lacks gumming. Blocks of this nature with full selvedge and visible printer's marks in the margin are particularly desirable, not only for their historical relevance in reflecting the economic chaos of the Chinese Civil War, but also for their aesthetic and philatelic value. Catalogued as Michel CN-IM 923, Scott CN-IM 868, Yvert et Tellier CN-IM 684, Stanley Gibbons CN-IM 1099, and China Stamp Society CN-IM 1262. Estimate "$60 – 80"