In my humble opinion, not all chips in Dale's book which are referred to as generic are, in fact, generic.

Take the eagle with snake PB-ES chip:

This chip was delivered to a distributor in El Paso, TX in 1923. Gambling was illegal in El Paso but was legal right across the river in Juarez, Mexico. The eagle with snake landing on a cactus is pictured on the Mexican flag. I think it's pretty obvious that this is a Mexican club. I just wish I could identify which club. I know there was a Monte Carlo Gambling Hall in Juarez. Then again there were many bars with slot machines (Cafe Mint, Gem Bar, Central Cafe, Saint Louis Bar)

Then there is a chip like the tiger PA-UT:

This may be a generic chip but, as far as I know, it is the only one known. I would think that there would be more found of this chip if it was sold "over the counter"