Founded1992OriginMount Joy, United StatesCatalog refs3Families3
Founded 1992 by Roland G. Murphy in Lancaster County, Pennsylvania -- the same county that was home to the Hamilton Watch Company from 1892 until it ended US manufacturing in 1969. RGM is the only vertically integrated watch manufacture in the US, building its own movements (Caliber 801, Caliber 20, Caliber MM2) and dials in-house rather than assembling from outsourced ebauches. Grail Atlas catalogs 3 RGM Watch Co. references from Mount Joy, United States across 3 collections. Each entry lists market-value bands, production era, brand tier, and what to check before buying.
enthusiastmodernRGM Caliber MM2 -- in-house manual-wind, 19 jewels, 18,000vph; one-minute tourbillon cage visible through a sapphire case-side window, the first serially produced tourbillon movement made in North America43.3mm2010–present
enthusiastmodernRGM Caliber 801 -- in-house manual-wind, 19 jewels, 18,000vph; the first serial mechanical watch movement made in the US since Hamilton’s Cal. 992B ended domestic production in 196940.3mm2025–present
enthusiastmodernRGM Caliber 20 -- in-house manual-wind, 19 jewels, 18,000vph, tonneau-shaped; RGM’s first movement built with a motor-barrel winding system, a friction-reducing American railroad-watch mechanism not used in a wristwatch for over 50 years before this38.5mm2013–present
