I picked up a T/100 inlaid chip at a garage sale today. I like old inlaids with different things on each side. I was at one yard sale and asked the guy if he had any old poker chips. He said no. However, another guy overheard me ask the question. He said, "your looking for poker chips? There's a yard sale around the corner and they have some". I thanked him for the info and asked what kind they were. He said, they weren't plastic, they were solid. I found it most interesting to learn that the two basic types of old poker chips are "Plastic" and "Solid"