Tonight I was lucky to get a set of three tournament chips from the Lucky Derby in Sacramento---and I found out there is still a fourth (1000 black) Still not sure if there is a 5th (5000 chip.) The obverse is the same on all the chips.

Needless to say I didn't fair well otherwise I could answer the mystery of the 5th chip very quickly.

http://www.jackpotauctions.com/cgi-bin/12345.pl?chips&1106369877