So, full disclosure, my wife is the amazing one who actually found this treasure purely by accident, but we're both equally pleased with it! As we were sorting through a lot of around 110 watches I came upon this one and immediately knew that it was the real deal. After checking all of the marks on it and doing a little research, it turns out we have a Must de Cartier, c. 1980s, mechanical, G.P. Vermeil. Still runs splendidly, still has the original jewel on the crown, and the original band with the signed clasp on it. I'm not sure if Cartier has anything special on the movement that I should be looking for, so that will require quite a bit more research on my part. I'm thinking we will try to get a new crystal for this beauty (as there is a scratch right down the middle) and a nice re-plating to finish it off. What a nice surprise at the end of the day, huh?