The Venetian Hotel in Las Vegas has a series of oversize 43 mm NCV chips they use as front-end comps for invited guests. They all are serialized and have the design shown in the 100 below. Here are the denominations made:

5 Lavender
25 Hot Pink
100 Grey
500 Light Blue
1000 Metallic Gold
5000 Red
25000 Blue Green

To date, the 5's have not been used and I don't believe any are in collector's hands. I know that the 25 and 100 denoms have made it into collections.

DonL