In casual conversation with several watch enthusiasts, I've heard that today there far fewer watch brands that make their own movements (called a manufactory) than a few decades ago. For instance, Omega used to but now they use ETA movements exclusively and in some cases modify the ETA movement (as with the Valjoux 7750). IWC modifies ETA movements for their watches as well.
ETA is part of the Swatch Group and practically monopolizes the Swiss watch movement scene these days. It's really quite amazing how many watch companies use their movements. Because of that, I'll leave off the "Swatch" brand.
Of course, just because a watch company uses a 3rd party movement, it doesn't mean their watches are less desirable. On the contrary, some highly innovative movements have been produced over the years--why not put a time proven movement in a beautifully handcrafted quality watch casing? Still... it's kind of interesting to know who is doing what these days.
So, I'd like to put together a list of watch companies here who make their own mechanical movements or modify existing ones, for reference. If people post what they know, I'll add it to this posting (as it appears I'm allowed to keep editing this first post). This is of course assuming it hasn't been done before on WatchUSeek... I couldn't find one in my searches.
So far the list is:
A. Lange & Söhne
Ball Watch Co+ (ETA)
Breitling+ (ETA, Valjoux)
Carl F. Bucherer
Dornbluth & Sohn
Eberhard+ (ETA, Valjoux)
Eterna (3030, new)
Grovana Revue Thommen
H. Moser & Cie (HMC 321.503)
IWC* (ETA, Valjoux)
Maurice Lacroix* (?)
Nomos (Tangomat, cal. ZETA)
Omega+ (ETA, Valjoux)
Panerai* (P.2002, ETA, JLC)
RGM* (ETA, Unitas)
Sinn+ (ETA, Valjoux)
TAG Heuer* (Valjoux; Mikrograph in-house)
Ulysse Nardi* (ETA)
Vacheron & Constantin
Villemont* (FP Journe)
* : some movements are made in-house.
+ : all movements are outsourced (e.g. ETA) but some are modified in-house
_ : those not marked either make all of their own movements or outsource a minority
Please let me know if anything is incorrect, or what names need an annotation. Again, I am no watch expert. Please forgive any mistakes--I'm very open to making corrections. I'm a novice watch hobbyist who became curious about watch movement manufacturers, didn't see any comprehensive list around, so I started this as a project. Thanks!
I realize India, Russia, and China have plenty of their own watch companies who make their own movements. It would probably be too daunting to add all of them. I'd prefer to keep it minimized to the top 1-3 companies.
As the list has grown, I've also started becoming more aware of the growing cottage industry of mechanical watch movements. It's really amazing how a field already saturated with fine quality movements has people still desiring to do things "their own way." I'm more of the mind that once something is done extremely well, why bother re-inventing it on an endeavor that may very likely fail to get much revenue traction? Anyway, I do want to avoid creating an "all encompassing list" of every single watch movement maker no matter the size, because it'll always be out of date. I'm more interested in a list that captures movement makers of above average stature, having strong public prominence either now or in the past. I don't know if there's any measurable benchmark to create a dividing line. I'm open to suggestions. Thanks for your attention.