Stamps of Bolivia, UNESCO 20th (in 1966) issue
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postage
1968, Nov 14 UNESCO 20th (in 1966) issue unwmk (no perf info)
| - | 20c | multi | Incan painted clay cup | |||
| - | 60c | multi | Incan painted clay cup | |||
| - | 1.20b | blvio & blk | UNESCO emblem | |||
| - | 2.80b | ol & blk | UNESCO emblem |
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