Stamps, issuer=China-issue=Martyrs secret mark unwmk-28c on-desc-id
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Hopei
postage1941 1941g issue ovpted on stamp of China - martyrs (1932) Hong Kong print unwmk (no perf info)
| - | 28c | ol | ovpt, Sung Chiaojen | — | — |
Shantung
1941 1941g issue ovpted on stamp of China - martyrs (1932) Hong Kong print
| - | 28c | ol | ovpt, Sung Chiaojen | — | — |
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