1940-1960s a group of 7 covers used in Yunnan, plus a post office statment of staff bonus f.w. SYS Silver Yuan 5c as revenue stamp after
1940-1960s a group of 7 covers used in Yunnan, plus a post office statment of staff bonus f.w. SYS Silver Yuan 5c as revenue stamp after liberation.1940至1960年代一組七件雲南實寄封，另附一件在解放後貼用孫像銀圓5分作印花稅票之郵局職員獎金表格。
