The Flamingo $5 chip is on the Chip Guide, which has both CG number and the TCR number --
CG # 095020
TCR # N1607

As to current value, Andy Hughes has this $5 Flamingo on eBay right now. Check the final value on Sunday when the auction ends.

https://www.ebay.com/itm/Flamingo-Las-Vegas-Nevada-5-Casino-Chip/124231154696?hash=item1cecc0fc08:g:fRoAAOSwS7xe3Pnj