1941 a group of about 659 SYS and Martyrs ovpt. "Mengkiang", surch
half value and resurch on ovpt. "Mengkiang" issues, including mint
and
1941 a group of about 659 SYS and Martyrs ovpt. "Mengkiang", surch
half value and resurch on ovpt. "Mengkiang" issues, including mint
and used stamps as well as dozens of variety stamps. Covering
various printings of original stamps.
1941年一組約659枚孫像及烈士加蓋“蒙疆”、蒙疆半值及加蓋“蒙疆”再改值票，包含新舊票以及40多枚變異票，原票版別不同。
