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fkwI used to own that exact Criger "1908 notebook cover", and also the Waddell below. I picked them both up on eBay a few years back right after they were cut.
David is right, they were originally seen in a big sheet, including Cobb, Mathewson, and a few other players. I believe there is only a couple of each player known. I havent seen them on eBay for a while. When they first hit the market you used to see them more often for sale.