Hello Brian,

your mom is right!
The chip is from the Sporting Club in Monaco / Monte Carlo.
The chip is # 3a in the book "Casino Tokens of Monte Carlo" from Thomas C. Day.

You can find a copy the the book in the CCTN Volume 14 Number 1 and Number 2.

Many greetings from Germany,
Bjoern Zabel
R-5585
www.casino-chips.de