On advice, I had to rub a white crayon on it to see what the stamp was.

I paid for an id, and later traded it to someone who really wanted it who gave me the better end of the deal for sure (thanks). For those who care, it is an Idaho chip and shows up in two records cards, both in Idaho:

Per Howdy Hertz:

12/16/1940
John H. Townsend
439 E. Clark Street
Pocatello. Idaho
200 red - 140 white - 140 blue - 20 yellow

and

1959
Art Woods
195 Maurive No.
Twin Falls, Idaho
500 red

Maybe used by the same people at two locations.

Michael Siskin