Who made the mc 18k 750 stamped bracelet?

by Andrea
(Canada)

Hi,
I have in my current possesion a 18k white gold bracelet weighing just over an ounce. It is art deco looking. There are 370 3mm sapphire stones of various colors in it. They are prong set. It kind of looks American but I don't know. It might be a reproduction. Does the MC stamp 18k and 750 on the other side help you to ID who and when it might have been made?

Thanks Andrea