My wife just recently acquired a Longines watch, and she would like some info as to year, model, and whatever else she can find. We took the cover off. Inside is stamped Longines-Wittnauer 8135 14K Gold L&W 30182. The Serial Number is 51448635. It is a silver colored watch, although some of the pics look yellow. I would appreciate any help since she's spent the last couple days and nights trying to find some info.