I inherited a Cartier watch from my mother. I'm not familiar with such high end watches. I'm a Baby-G watch wearer. This watch has some sort of stain or dark rust on the corner of the face and I don't know if it's running or not. Does anyone know if Cartier will offer some sort of service or repair? I have 2 Cartier boutiques within driving distance but have never stepped foot in there. Any advice or recommendation is great. Thanks!