Issued in 1929 by the Yunnan provincial postal authority, this full mint never hinged sheet of 100 stamps commemorates the state burial of Dr. Sun Yat-sen, featuring the iconic mausoleum in Nanjing. Each 1 cent stamp is gravure printed in brown orange and line perforated 14. The sheet bears the regional Yunnan overprint applied to the national commemorative issue, symbolizing provincial participation in this historic moment. Catalogued as Scott YU25, Michel CN-IM-YU 25, Yvert et Tellier CN-YU 25, Stanley Gibbons CN-IM-YU 25, and China Stamp Society CN-IM YN26, this item is a scarce intact multiple. The sheet includes original marginal control numbers and full gum, with all stamps in pristine mint never hinged condition. Estimate "$480 – 560"