General Sale Part III + Part IV + David Toong's Collection

1940s a group of 15 ROC covers, some with nice multiple frankings, some sent from Kwangtung district and we noted a value declared cover sent from Sikang Wingking to Yaan. Please view.
1940年代一组15枚民国实寄封，包括贴大方连票封和广东地区寄出的封，还有一枚西康荣经寄雅安的报值挂号封。请预览。