PISC Discussion Forums
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Speaking with an old stamp collecting friend who used to collect Gilbert and Ellice Islands material, in 30 years of collecting he has seen only three of the manual over-valuations (including the one in the attached photos) and only one of the cancelling device type. All of the overprints/over-valuations have been on covers, like the one in the attached photos. The one example with the cancelling device is owned by an American dealer who, as I understand, will not allow anyone to take a photo or scan of the cover.
I have also heard that there are fakes of the manual overprints out there. Can other readers/collectors shed any light on this issue?