C12, CSS AM16, 1932-1936 - Peking Airmails, 25c, narrow Type, in block of 25, 5x5 with some perf. separations and small tear at stamp pos 21

C12, CSS AM16, 1932-1936 - Peking Airmails, 25c, narrow Type, in block of 25, 5x5 with some perf. separations and small tear at stamp pos 21