I had set out at one time to collect a watch from each of the members of the Community of Precision Watchmaking that used the AS 1687 ebauche. I made it as far as a caliber 214 Ebel and a caliber 88 Zodiac, and then set my sights on a caliber 1152 Favre-Leuba. But I was diverted in my quest by the ultra-thin 2.95mm caliber 253--made in F-L's own workshops and one of the most interesting double-barreled handwinders I've ever seen. I found a 1967 British Horological Institute article hidden away on the AWCI website that reinforced my interest. This was the product of that search (for which I paid a whopping $75):
Favre-Leuba is one of those small players (at least in terms of retail visibility in the USA) that wielded occasional real influence in the Swiss watchmaking world. For example, Henry and Barbara Favre provided sustaining money to support SAPHIR, the holding company formed by Roger LeCoultre as the successor to SAPIC, the LeCoultre family holding company founded by Jacques-David LeCoultre. This saved JLC in the late 60's, and it's also the reason one finds JLC and F-L quartz watches with the same movement in the early 70's.
--Rick