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Continue to ChatGugh Island 1975 Birds Sheetlet (4v, 10p to 50p, U/M) https://www.grahamlandstamps.co.uk/shop/stamps/cinderellas/gb-offshore-islands/gugh-island/gugh-island-1975-birds-sheetlet-4v-10p-to-50p-u-m/
Gugh Island 1975 Birds Sheetlet (4v, 10p to 50p, U/M) https://www.grahamlandstamps.co.uk/shop/stamps/cinderellas/gb-offshore-islands/gugh-island/gugh-island-1975-birds-sheetlet-4v-10p-to-50p-u-m/