Sorry can't help much on that one.
You can blame the Club member that found the BC Wills family 10 days after they took the records to the city dump.
But:
"He also notes that he thinks that it is from the Sagebrush Club in Fallon, NV from the forties, before the place was legal."

Gaming became legal in NV in 1931. I am amazed at some of the stories that get passed around on initial chips.