Hello - I have a manual wind Breguet 5907. I purchased it from an authorized dealer in 2008. In the 3 1/2 years that I've had it, the watch has had to be serviced 3 times. Each time is because it either runs too fast or stops running completely. I suspect that it may become magnatized, but I can't prove it. I understand that a fine watch will need service during it's lifetime, but at $920 a service -- How often should I expect to have my watch serviced? Thank you! Eddie