Please help, PSA says color added. Pics

Ok, I have been getting cards graded for 9 years now. And I was on a streak of about 4 years straight without sending one altered card. I got pretty good at spoting the fakes. This one I got back last month as color added. Im not sure what they are seeing. Ive held it in many angle in the light and I cant see anything. Can anyone help or spot it?



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Always looking for Topps Salesman Samples, pre '51 unopened packs, E90-2, E91a, N690 Kalamazoo Bats, and T204 Square Frame Ramly's
Bosox1976