Can’t test pcgs or any other slabbed coins with the pinger method. I used to buy slabbed coins if the price was right. I felt that at the time of resale a buyer would feel more confident if they were graded by a reputable outfit such as pcgs. Now even they are being counterfeited. That’s why I was asking about the sigma testers, they can test through plastic. I was just wondering if anyone on here has used them.
