Hi, I've bought this token that I selected in a lot of transit tokens, but it has so little clues that I'm not even sure it is a transit token. It has a monogram (CD ? MD ?) on both sides, against a dotted background. Probably brass, weighs 2,9 g, measures 16 mm. Any thoughts ?

Thank you !
Si tu cognes ta tête contre une cruche et que ça sonne creux, ce n'est pas forcément la cruche... lollll mon proverbe préféré !