Don....I didn't see any of those plaques there. All of the plaques look like this one.

I didn't keep anything higher than this. They have Pink Round 10,000 and the rest were all rectangular. As the Denominations got bigger, the plaques got bigger too. I can't remember, but I think the 20,000 was green and the 50,000 was yellow. I had a few 10,000's in my hand, but decided not to keep any. ($15+\- US value)
***your plaques I'm 99% sure are obsolete.*** And I agree ...they are great looking!
I did see about 4 of the 1000's on the tables. I think they are phasing them out to go with chips?!?