Stamps of Cook Islands, 1sh6p denom
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postage
1960, Apr 1 ovpted wmk. multiple NZ & star (no perf info)
| X | 1sh6p on 5p | vio & grn | mail plane landing at Rarotonga Airport |
1963, Jun 4 1963 issue
| X | 1sh6p | vio | Queen Elizabeth II |
1966, Nov 28 Christmas 1966 issue
| X | 1sh6p | multi |
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