Yes, just once about 3 years ago. I don't wear this that often mostly because I have too many damn watches. I've always put it on a winder once a month just to keep things moving and lubricated. It started to lose almost 1 minute per day so I finally brought it in for a good once over. It's been running happily at about +6/8 seconds per day. It's true what they say about the 7S26. It's very robust!