My Sinn is losing about 30 seconds a day so guess it needs a service (think it's a few years old so no surprise really).
Where's the bast place to send it, to Chronomaster or back to Sinn, or somewhere else?
Also, any idea of typical cost? I don't think there's much wrong with it except for the time loss. Oh, and the screw in crown doesn't seem to screw in more than about 1/2 a turn, don't know if that's normal?