This Brand from my understanding is very old & handmade in Switzerland by a private watchmaker, in small workshops. Quite a rare jumbo size from the 20-30s era lug with lug is a whopping 53mm approximate 29mm across and about 32mm with winding crown.

Last service unknown, a service is recommended for optimum running. Selling as is with the strap in the photos.

Will ship Worldwide, $1200 inclusive of tracking shipment, Bank transfer or Wise preferred.