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scott brockelmangilliam squires is just another collector from 90 years ago, that did what many collectors of the day did, he rubber stamped his cards. another large group of cards, especially obaks, come with a blue "russell sewall" stamp. granted some of these people had large collections, they are neat but in no way add totheir value, on the other hand the devaluation is probably to different degrees with different collectors, some prefer crease free, some centering, some photo clarity, each person has their own parameters and asthetic desires.
scott