While digging through some of my Grandmother's stuff to sell on E-Bay, we came across a treasure!
A vintage Showboat, Las Vegas Chip.
"The Chip Rack assigns a number to each chip, and this chip is N6689. There were 1,000 of these issued in 1956 and the 9th edition of The Chip Rack, which came out in June 2002 values it a "T"."
(Thanks to Mark C., :-))
Take a look at this remarkable chip on E-Bay!