Stamps of San Marino, 1933, missing overprint, overprinted
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postage
1933, May 27 philatelic convention 1933 issue ovpted wmk. three plumes (no perf info)
| - | 25c on 2.75l | dkvio | post office | |||
| - | 50c on 1.75l | dkbrn | post office | |||
| - | 75c on 2.75l | dkvio | post office | |||
| - | 1.25l on 1.75l | dkbrn | post office |
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