Magnus,
I lost one of the push buttons, so it had to go back to the Minerva shop to replace that one. They found that the caliber had sufferd from moister inside and it could not leave the workshop without a complete overhaul. It took approx 6 weeks and the cost was at Montblanc Villeret level (Eur 1200). So very pricy. It is not an every day watch now any more and I only wear it on special occasions.
Regards Wim