1915 and 1918 a pair of Flag of ROC 1c PSC to USA, tied by Shanghai and Siangtan cds respectively. One with dropped stamp, coloured
1915 and 1918 a pair of Flag of ROC 1c PSC to USA, tied by Shanghai and Siangtan cds respectively. One with dropped stamp, coloured painting. 1915及1918年一對五色旗1分郵資片寄美國，銷上海及湘 潭日戳。當中一件掉票，內容一面帶彩繪。
