Should my mechanical wrist watch be loosing time?

I bought a very nice $5000 montblanc wristwatch a week ago and I've synced it almost perfectly to the iPhone watch and I've noticed that my wrist watch tends to run ahead about 50 seconds every day. Is this normal?

Not for a 5k watch. Check the specs of the watch on their website, it usually says how much time they loose. My $400 Diesel watch doesn't even lose that much time so I would think it abnormal.