If I suspect that a card is trimmed, I put that card in a stack with cards (about 3 or 4) from the same year and look at the grain of the cut on all 4 borders on all the cards. If a card is trimmed, ususally the grain pattern (cut) will be different.
Just a couple of weeks ago, I had a '62 Topps high number that I suspected of being trimmed. I put with a small stack of other '62s and it stuck out like a sore thumb because the grain pattern was different on the one I suspected of being trimmed.
|