The G100 from Lajoux Perret

The movement has a 68-hour power reserve

24 jewels

 A frequency of 28800 A/H (4Hz)

Manufactured by la Joux-Perret in la Chaux-de-Fonds

HTTPS://WWW.LAJOUXPERRET.COM/LA-MANUFACTURE

(picture courtesy from Daniela Marin The Naked Watchmaker)

Reply