Philippe Dufour falls into this category. A "watchmaker's watchmaker", he isolates himself in his native valley de Joux Switzerland, and is perfectly happy making only 25 watches every year, albeit 25 superlative ones.
30 minutes off the wrist with the new SEIKO GPS Astron
Antique IWC 14k Yellow Gold Mens Open Face Pin Set Pocket Watch to Fix #IWC
Rare Solid Silver 1945 Longines Mens Pocket Watch w Original Papers Chain #Longines