Stamps of San Marino, 50th Anniversary of UNESCO issue
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postage
1976, Oct 14 50th Anniversary of UNESCO issue unwmk (no perf info) (6 stamps)
| - | 180l | multi | ||||
| - | 220l | multi | ||||
| - | 450l | multi | Yellowstone Park (1996) | |||
| - | 500l | multi | Prehistoric caves (1996) | |||
| - | 650l | multi | San Gimignano (1996) | |||
| - | 1450l | multi | Pilgrimage Church (1996) |
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