My wife has a Must 21 de Cartier that she bough even before I met her. She told me it stopped working. I though it had an automatic movement but during research I found out that it has a Cartier 690, which is a quartz. So I went straight to open the watch and for my surprise the movement says "Japan movement" :S
As Cartier is a "swiss made" watch i found this to be very weird. She bought for someone with a "great discount", for $1k something. But I think its a rip off
I will post pictures later.