I have noticed a few differences in the 50 cent chips at Argosy Casino in Lawrenceburg, Ind. Besides the inserts, the words Lawrenceburg and Indiana are spaced differently relative to to each other and the balloon. The "50c" is larger and higher on the balloon on the newer chip. Also the UV security mark is somewhat different. I am learning a great deal about UV marks on chips from Greg. I hope this cancer thing is just a bump in the road.....Get well soon!