Love these. The Large Key chip was made by Burt/ASM prob in the 70s or 80s. I am pretty sure they are considered
CIC's; Coin in Center (or was it Coin in Chip?), like the Bud Jones chips are called.
Here is a few Burt samples that i have and the last one is 43mm, though the Nugget looks more like a coin as these metal discs seem thinner. These Burt samples were probably a lot older than those Nuggets, though so they could just be protypes.
Off the top of my head, other than the Carson City Nuggets (also a $5 chip out there), i can't think of any other casino issued Burt/ASM
CIC's? Maybe in the Caribbean/DR/PR, etc? There probably a few, but can't think of any right now. The Nuggets may be your best bet. Might want to check with David Spragg, to see if
CPC can make them?
The Paulson chips are called Metal Center chips. There seems to be a decent number of casinos that issued them in the 70s and 80s, including those Calif Card rooms (like those show above) and Nevada casinos like the Fremont, Golden Gate, Gold Dust in Reno, etc.
Good luck!