Maybe this security feature has been used elsewhere but I had not noticed it before. When I was playing at Caesars, it saw markings in a white box on the $100 chips. At first I thought it was a bar code for sorting, but with a glass you can make out the Paul-son name repeated several times, along with the denomination. Later I saw the same technique was used on the Harveys $100's and up.
Paul-son security marking I've seen then are:
- rim marking of repeated maker's name and $xx
- microdot with repeated maker's name
- drilled and filled hole (with hidden marks??)
Anyone know of others?
Below is a pic of the Harvey's 100 with the marking magnified.
