I have a 25 year old Rolex Presidents and I don’t remember ever having it serviced. It started running very slow, but I couldn’t find a local Rolex approved service center and was a little hesitant to ship my precious watch clear across the country to a company I had never dealt with? I emailed and called the shop to talk with them about my concerns. They made me feel confident in their ability so I shipped it to them. They responded when they got my watch and told me it would be about 3-4 weeks to service it.They did a fantastic job of completely overhauling my watch, replacing the main spring and several other worn out pieces, and then cleaned it and made it look like new. Very Happy with Manhattan Time Service and Thank you Very much for the Excellent job on my Timepiece. GLS