Stamps of North Korea, 1977, missing perf, not overprinted
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postage
1977, Jan 23 Olympics 1976 winners c issue unwmk (no perf info)
| - | 60ch | multi | — | — |
1977, Mar 8 Olympics 1976 winners d issue
| - | 10ch | multi | Jordan Mitkov, Bulgaria | 12 |
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