China 1941, complete sheet of the Martyrs of the Revolution issue overprinted with small characters for use in the Japanese puppet state of Mengkiang. The stamp features the portrait of a revolutionary figure from the Republic of China period and carries a denomination of 20 Chinese cents in ultramarine. Printed using gravure by De La Rue & Co. Ltd., the stamp lacks watermark and shows variable perforation, reflecting the wartime production standards. This issue is part of the Mengkiang regional overprints applied to national definitive issues during the Japanese occupation. Cataloged as Scott 2N4a, Michel JP-MG 4I, Stanley Gibbons JP-MG 4A, and China Stamp Society CN-IM MK7. The block is mint never hinged (MNH), post-office fresh, and includes selvage with marginal imprint, adding to its appeal for specialist collectors. Estimate "$230 – 260".