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Old 27 March 2025, 11:38 PM   #4
GTS Dean
"TRF" Member
 
Join Date: Feb 2011
Location: NB, TX
Watch: 3570.50
Posts: 1,028
I'd assume there's a gear that has a slight bend, or burr on it. Or, something is touching the front (minute hand) or back of the dial's stick rivets (5-minute intervals). A qualified watchmaker should easily be able to spot the problem.
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