I believe someone (a chipper) had too much time on their hands, found an old rubber stamp at a flea market and made himself a tie in to the SS Monte Carlo.

The brown "Katlemen" chips were delivered to a auto park in LA. Notice the spelling diference in the name Allan quoted. (Katleman) Mistake? Maybe, Maybe not.

I have an email from Ernie Marquez somewhere stating:
The SSMC was a very elegant ship and would never have used hot stamped chips. He has pictures of C&S on the tables. Does not mean a lot but Ernie is considered the expert on the CA gaming ships.