A $10 chip was made by the MGM for the August 1995 fight between Mike Tyson and Peter McNeeley. For whatever reason (most fingers point to Don King) the chips were never released, and later destroyed.

As far as I know, only two of these chips survived. Both sides shown. TCR #V6917.

I came across this - a sheet of 35 of these original inlays.

Pretty cool, huh?