[NiceDocter]

There was a big time dealer in the Cleveland area back in the 1980s that stamped all his cards with invisible ink on the back in an effort to catch shoplifters. I always thought it was a bad idea in that who knows what that ink would do to the card in 10 or 20 years If any of you bought a card from him and still have it...... put a black light on the back and see !!! I have edited my post to delete the name as I am not sure if he did all his cards this way or just the big ones .... my time seeing this was between 1982 and 1985.