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hankronPaul beat me to it. As I hate to feel redundant, I add that the Old Judges are not like modern cards. They consist of a paper photograph pasted to a piece of blank cardboard. The missing cardboard was only there as a backing. So the skinned John Ward Old Judge photo could be pasted to new piece of cardboard ('rebacked').
Ordinarilly, collectors stear well clear of skinned cards, unless they are N172 Wards, Four Base Hits or such.