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Hi, there. I took my Breitling with a B17 movement in for regulation. It was running over +6 seconds a day. My watchmaker called me to say he’s testing my watch. He told me that fully wound, it runs at +1 s/day and as the power reserve drops, it speeds up to +4 to +5 s/day. He offered to adjust it slightly into the minus to see how it performs for me, though he mentioned running slow isn't great. In the end, he told me to just leave it to him.
Should I leave it to him, or should I tell him…
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