Vierport
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What do we think of the La Joux-Perret movement LJP7380?
I think it's looking great with nice specs.. It is handwound. 90 h powerreserve.Thin at 2.7mm and has a diameter of 30mm.
It is not used by many brands. Sartory Billard SB5 uses a personalized version and it is also used by Arnold & Son.
Picture below is the LJP7380 Soigné grade