A "jeton à consommer"?

[ZYV]

This strange (IMHO) token is small.
17.5 mm.

How it was used?

[ZYV]

Cartaux is engraver, as it's known:
Cartaux - engraver

On whose behalf was the token minted?

[saro]

This translation from a french numismatic forum could help:
"The CARTAUX Company was a large manufacturer (early and mid-twentieth century) of advertising tokens, "jetons à consommer", gambling chips, medals, lucky charms, casino chips, etc.

In 1902, when slot machines appeared around 1890, a law no longer allows the distribution of cash earnings, only those  delivering gains in nature, such as sweets or cigarettes, or tokens "à consommer". The token "jeton àconsommer" could not represent more than two to three times the bet, which itself should not exceed 10 centimes (at the beginning), and it had to be used in the establishment where the machine was located. These machines were installed in various public places, such as "cafés" (coffee shops). They were definitively forbidden by a decree of August 1937."

[FosseWay]

This site has a good explanation of how these tokens were used, as well as a list of many examples.

Essentially they came about as the result of a French law passed in 1902 which forbade the payment of winnings from gaming machines in normal cash. Additionally, the prize could not be more than 2 or 3 times the original stake, and the stake could not be more than 10 centimes (at the start of the period; it went up later). This explains the preponderance of à consommer tokens for the values of 20 and 30 centimes. Furthermore, the winnings had to be spent in the establishment where they were accrued.

The tokens ceased to be useful in 1937 when gambling with slot machines was made illegal.

[ZYV]

Friends, thank you for the information!

[malj1]

There is a very large series of these French slot machine tokens and they are often found made for the UK market with pence values instead of centimes, using the same obverses.

See What are machine tokens? and also information on Francis Cartaux here

[bagerap]

This may be useful:

Les Jetons à Consommer