I bought my Seamaster on ebay (guy got it as a present (came from Torneau) but wanted a big screen t.v. instead) about 13 years ago. It was the beginning of my real collection and to this day I love it. It has never failed to work properly but I'm not one to get into how many seconds it gains or loses in a day, all I know is it keeps good time. My question is, do I take it in for a servicing / clean & oil. There's absolutely nothing wrong with it and I'm actually a little scared to have it opened and messed with. I do have a good watch guy who's been servicing my watches for years, but I kinda feel like as long as it works well, then leave it alone, matter of fact, that was his recommendation to me. So, what do y'all think?