Here is the eBay seller's response to my request for attribution:

>>> Jerad D <JADILL@webtv.net> 08/18/00 16:50 PM >>>
Well the person I got them from told me he won them at Circus Circus Las
Vegas, he delt cards in Vegas for 30 years that is the basis of the
Connection! Thanks for the interest! As for the other casino he says he
hasn't ever been there!

Thanks
Keepitgreen