RGM Watches is named for founder Roland G Murphy and based on Lancaster, PA. High-end bespoke and handcrafted mostly, they also have a nice line of ETA-based watches. First-rate stuff, probably the best watchmaker in America.
(Image credit: SteveG)
As of 2009, they have their own movement, the calibre 801:
(Image credit: RGM)
Handwind, very much in the style of vintage American pocketwatch movements.