Eden was completed in 1889 and demolished in 1911 to make room for the new casino at Trouville. There was a "Casino-Salon" in Trouville and early jetons read CASINO SALON TROUVILLE (depicted in Jetons Metalliques/Reynckens-Elie) with monogram CST. That property dates way prior to CE and notes show C d'T dating to early 1800s [1830].

Your M-O-P is from Eden Casdino in Trouville-sur-Mer.

JB