Issued in August 1946 during the early post-war period under Republic of China administration, this block of four stamps shows the third London print of Dr. Sun Yat-sen's Martyrs Issue with an overprint reading “Restricted for Use in Taiwan.” Originally denominated at 30 Taiwanese dollars, it was surcharged to 1 dollar. Printed by De La Rue & Co. Ltd. using gravure and typography, the stamp measures 23 x 26 mm and is in brown. Perforation is variable, consistent with late wartime and transitional issues. The block format, with full original gum and no hinge marks, highlights the rarity and collector interest tied to Taiwan-specific overprints. Estimate "$85 – 100"