The older PSA cases are fairly easy to open with a can opener and a flathead screwdriver, but the hermetic seal would usually give it away, I think. The plastic splinters and turns white. I would think that any case that is opened like this and then "tampered" with would obviously look like it had been broken if someone tries to put it back together.
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Postwar stars & HOF'ers. Cubs of all eras. Currently working on 1956, '63 and '72 Topps complete sets.
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