I just got a new Lange Saxonia from an AD (216.032) and the power reserve based upon my tests of the fully wound watch fall at 41 hours instead of the advertised 45 hours. Is this cause for concern? Is it because the watch is new?
At this stage, I would not worry a lot even if the PR is 10% too short. Fully wind it several times and check the PR after let's say 2 or 3 weeks. If the PR is still too short and if it is a concern for you, bring the watch to your AD. For me, it is not a...