Would this be a good bday present for my mother? (Looking for advice from women)?

If your mom is a watch wearer/has good enough eyesight to see the numbers, then it's alright. Whatever you get her, make sure you make her an individual/special card and some flowers, that will make her feel better than anything you could buy. Moms just want to know you care and took the time to do something just for them. Make her mother's day something special for her to remember whenever she wears the watch.