Slot tokens not seen in play at the casino (both sides shown)....

....but shown in rolls (I think) in the Bellagio vault. (Look to the upper shelf on the left of the screen capture shown below.)

I purchased these in rolls of 20, but opened one roll to see if all the tokens were marked on both sides. They are. I have a bunch available (no COA or LOA), and a number of the prop chips still left (with LOA). They are not plastic, but no solid metal either. Somewhere in between. Email me if interested in anything.