I collect old poker chips and at this year's convention I picked up a few I had not seen before. In the photo below the chips at the top have different size of the letter Z. That one is easy to see. In group 2 the position and thickness of the Maltese cross is different. On the left hand chip the top right points of the cross are well within the ends of the crescent. On the right hand chip the points go all the way out to the crescent ends. In group 3 the general shape of the flowers and bows are somewhat different. I guess it's my old coin collection and photography background kicking in. When I go through a bunch of old chips these differences jump out at me. " The devil is in the details"