Would it be worthwhile to get some quotes from a couple of reputable paper conservators? If the card is that valuable, I'd definitely explore that option. If they can't do anything with it due to type of glue, they would hopefully let you know prior. It doesn't cost anything to get a quote, and it may not be that costly relative to value.
Last edited by BillyCoxDodgers3B; 08-31-2025 at 07:13 AM.
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