No doubt these following tokens are french :
Source : Tokencatalog
Source : collectiondemonnaie.net
Then for this one, french or american ?
Source: Delcampe
Even though the unique important exposition in the world was the Universal exposition in Paris on 1937,
a seller proposes : “1937 Cleveland, (Ohio) Great Lakes Exposition Mills Slot Machines.”
The reference to Mills Novelty Co. Chicago is good line of research, this "exposition 1937 token" was also sold in a lot of aracade tokens : Mills (not in Hayes) Exposition 1937, another C.R.C.C. both (25mm) in nickle plated steel.
What do we think of this proposition: “The Great Lake exhibition”, held in the summers of 1936 and 1937 in Cleveland (OH) ?
Organized to celebrate the centennial year of the incorporation of the city of Cleveland, the Great Lakes Exposition sought to highlight "the material, social and cultural progress which has been achieved in the Great Lakes Region in the past 100 years". I think: out of topic.
When you write only "Exposition 1937", w/o mentioning 1936, and you get 2600 employees on site without taking into account offsites sellers, it's just Paris,in the American building, what else.
But, what about this logo M ?
It's closer to the St. Petersburg metro logo than to Mills Novelty Co logo !
Source : 1stdibs.com
The for CRCC, “Chicago Regional Chamber of Commerce” gets only one result with Google :
So, probably not the solution.
The Chicago Commercial Association and Industry, as it was originally known, formed in 1904. In 1992, the organization took on the name Chicagoland Chamber of Commerce (wiki)
Plus : An extraordinary 20 minutes movie about this factory of 2,600 employees in Chicago in 1935 which manufactured and assembled all the parts of Mills machines.
And the automatic Piano and violin Moonlight sonata.
Finish with Mills Novelty Co in France ?
No for sure :)
You get this munificent Elk slot machine from 1912, actuated by 25 centimes coins.
And this surprising machine actuated by 5 francs coins, so well after WWII when these machines where prohibited in France since 1937 and Mills Novelty Co. took over by Bell-O-Matic Corp.
But that's another story, probably an update of rules for undercover machines …
[edit] an update from the slot machines collector website retro-jackpot.fr :
Mills created a machine looking like a building of the 1933 Chicago World's Fair: The “Mills Extraordinary”.

This suggests that the CRCC 1937 token mentioned above was created for the Paris World's Fair.
This “Mills extraorinary” machine was also the first machine to use this type of token with a capital M. It was a bimetallic token with a metal core that could be sorted and held by a magnet. Unlike real coins and brass tokens, which weren't held by the magnet and fell directly into the operator's cash register, this allowed the old tokens to be removed from circulation and the new ones to be introduced.
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