Cook Islands block of 6 types

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Issuer: Cook Islands
Block in sheet 19097
Date: 10/23/1967 (1967 blocks)
(6, 3 x 2)
1, 1: 1c
1, 2: 3c
1, 3: 5c
2, 1: 8c
2, 2: 15c unwmk
2, 3: 22c unwmk