I would have to see a scan or a xerox, Dick.
The only DI's with an "A" in the center that
I know of are the Wilbur Clark's roulettes on
p. 47, TCR-6.

There were also Desert Inn's in Ridgecrest, CA
& McDermitt, NV. during the '60's which could
have a H&C (CJ) mold. Does your chip say Las
Vegas, NV?