Here are the chips. I have 3 colors.

Clarence A Willmering
Recreation Club
327 Polk
Amarillo, TX
4/13/42
1000 B9 checks
400 yellow
500 red
100 chocolate.
Mono both sides in gold.
The monogram is actually CAW-look close you can see the “Mono CAW” on middle card.
On top and bottom card Mason calls it Flying A.
On Willmering card they say it is CAW.

I have one each red, yellow, and chocolate. I got them in 1999. Further research:
Clarence had a liquor store at that address and his brother Walter had a Recreation Club next door, both brothers were involved with gambling in Amarillo. They were the sons of Charles Willmering who moved to Amarillo from Iowa around 1908. As it turns out, Charles was the elder brother of Arthur Willmering, father of Frank from Pendleton, OR.

Conclusion: We have some history of a family from 1908 through 1981, 5 states, 2 different chips and the best we can do is, The Flying A was used at a Recreation Club in Amarillo, TX.
If you collect illegal chips, you have to “Love the history.”