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Hello!

New member to the forums.

I purchased a brand new Longines Master Chrono Moonphase less than a month ago. The movement is a Longines-custom ETA/Valjoux 7751 (reference L687.5).

Every complication is running fine and the time runs like -3s/d. However the movement is making a weird «metallic click»-sound, often when the rotor is coming to a stop.

I can demonstrate this in a 5 sec video:
Recorded with phone mic, so use high volume!

The «click» is pretty loud and frequent, it can be heard when i stretch my arms!

I’ve had a Valjoux 7750 movement from before, so the rotor noise is well known to me. However, this «click» sound is new to me. Is the movement faulty or is this normal?
 
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