cartier ladies gold wrist watch ?

This is a Cartier ladies wrist watch, I have owned it for several years and wear it occasionally, it runs very well it has no cartier box or papers my husband bought it at auction. I had the winder replaced as it was loose, at W Turners jewlers surbiton, it was replaced with a genuine one ordered from cartier in london, the strap was also replaced, so is not original although they did put back the original cartier buckle. This watch has the usual markings it is not plated and has the 18k mark with the serial numbers on the back. my daughter is starting university september and the funds will help with fees etc. I have enjoyed owning this classic watch and hope it finds a good home.