I finally got my copy of the revised edition of Dale Seymour's book on poker chips today. Now I can understand the chip codes with other collectors. I noticed one design called PD-DR geometric is identical to the design used on chips from The Arrowhead Inn near Cincinnati back in the 1930s. the Arrowhead chips are on the Jack Todd Co. diamond mold and the one in the book is idicated as on a plain mold. The question is Did Jack Todd only made diamond mold chips or also other types? Or did someone rip off his design for the plain mold chip? Were these designs copywrited or, did anyone that wanted to use them. thanks for any info