Stamps of China - Hopei, 13c denom
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postage
1941 1941b issue ovpted on stamp of China - martyrs (1932) unwmk (no perf info)
| - | 13c | blgrn | ovpt, Chu Chih-hsin | — | — |
1941 1941f martyrs issue wmk. yu
| - | 13c | — | — |
1941 1941g issue ovpted on stamp of China - martyrs (1932) Hong Kong print unwmk
| - | 13c | yelgrn | ovpt, Chu Chih-hsin | — | — |
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