Nice examples, Andy. The square plastic laminate
plaques have been used since the 1950s in France.

I have a duplicate 10.000 Casino International
Bourgogne et Grasset (obverse) plaque keychain with
"three overlapping lunettes" and measuring 66 x 56mm
(the same size as the Dinant 25.000 and
Chaudfontaine 5.000 plaques), should you or anyone
else have a duplicateblue $1,000 square and willing
to trade.

The reverse of my sample has the tel/fax numbers and address of
B&G, and nowhare on the plaque is seen "NO CASH
VALUE."

JB