Stamps of China - Yunnan, 20c denom
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postage
1926 1926 issue ovpted on stamp of China unwmk (no perf info)
| - | 20c | lake | ovpt, harvesting rice | — | — |
1932 1932a issue ovpted on stamp of China
| - | 20c | ultra | ovpt, Sun Yatsen | — | — |
1933, Jan 1 1933 issue
| - | 20c | brnred | — | — |
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