.. must be of the crest & seal variety (sorry for not specifying)

Here is my site as a guide (which is subject to correction):

http://www.oldpokerchips.com/images/NNevadaBig/CaliforniaBig/Commercialwhite.jpg

BTW, if those chips were crest & seals, I would have paid $50 + $30 +$30 plus a Dunes roulette