I think you should go back to a JLC Boutique and ask them to check your watch by their watchmaker, in your presence.

Jun 02, 2021,07:05 AM
 

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Master Control Chronograph Calendar - sharing experiences

 
 By: cerulean : June 2nd, 2021-00:13
Hi folks - I absolutely love this watch. I know it's not everyone's perfect watch, but it is pretty close for me. However, I have noticed some curious behavior in the performance of the chronograph. JLC replaced the first one under warranty, but the repla...