Stamps of Bulgaria, 29 May 1971
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postage
1971, May 29 prehistoric animals (1971) unwmk p. 12.5 (6 stamps)
| X | 1s | multi | mammoth | |||
| X | 2s | multi | bear | |||
| X | 3s | multi | Hipparion | |||
| - | 13s | multi | Mastodon | |||
| - | 28s | multi | Saber-tooth tiger | |||
| - | 20l | mammoth |
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