Marysville CA. according to Jung & Pfaender's Guide and John Kallmans site: http://cashcoinconnection.com/gamingchipsCalifornia/M/MarksClub/MarksClub.html

The seller included the tale of Mark's Club as related to her, I liked the story and I've included it for your consideration.

Mark's Club Gambling Poker Chip I've been told these chips came from a card room that use to operate in Marysville, California from 1952 to 1966. Several movie stars of the time like John Wayne, Robert Stack, Clark Gable to name a few, while on pheasant and duck hunting trips to their private club in the northern Sacramento Valley Sutter Buttes use to frequent several of the local card rooms in the area. Mark's Club was one of them. The card rooms also would run a brothel on the side. In the mid '60's they were nearly all closed down for illegal gambling. What exactly that means, I'm not sure. I haven't any facts, just some chips and here are a few