Stamps of Kenya, Uganda, Tanzania, UNESCO 20th issue
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postage
1966, Oct 3 UNESCO 20th issue unwmk (no perf info)
| - | 30c | UNESCO emblem in green box | ||||
| - | 50c | UNESCO emblem in green box | ||||
| - | 1.30sh | UNESCO emblem in green box | ||||
| X | 2.50sh | yel & grn & blk | UNESCO emblem in green box |
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