USPC made several "straw" chips. Besides an "M", there is a "KC", a JB", an"E" one with a symbol for man in it (a circle with an arrow attached - like from the old Ben Casey show). Of course there are several varieties with numbers.

I don't think any were generic. All these chips were made for clubs (in my opinion).

Many of the USPC chips had similar designs with the only difference the letters that signified the club.

Most importantly, I need that chip!!