When I use the word "currency" I am asking if these chips are 'current' enough to be redeemable?

All scans are courtesy of the MoGH's ChipGuide!

Luxor chipcos:

Aladdin/Planet Hollywood:

Arizona Charlie's chipcos:

Bally's/Paris chipcos:

Casino Royale chipcos:

Excalibur:

And pre-MGM/Mirage LE's?

Flamingo (HILTON):

HILTON:

MGM Grand:

Palace Station:

Plaza:

Tropicana:

Tuscany:

Thanks, Jim