Caliber 20 Models
The Caliber 20 is one of our most beautiful movements with classic lines and traditional high grade construction and finish. The movement is hand built in our workshop in Pennsylvania. The Main-plate and Bridges are cut from solid German Silver (Nickle-Silver), then hand finished and left unplated. The seconds are displayed on a disc, similar to many watches from the 1930's. The Moonphase is large with moons made of Mother of Pearl. It can be quick-set by turning the winding crown backwards. It is also a "Precise Moophase" - to have one day of error would take 120 years if the watch is kept running.
The Motor Barrel is an old American system used in the highest grade Railroad watches like the Illinois Bunn Special and the Hamilton 950. The Motor Barrel allows the mainspring barrel to ride between jewels when the watch is running. In America's great watchmaking past there were two Motor Barrel types: one protected the movement if the mainspring broke; a later system reduced wear and friction, and made a more stable barrel in the movement. We use the later system. Prior to the Caliber 20, the last watch with a Motor Barrel was made more than 50 years ago.
Movement Caliber: RGM 20, American Made, Manual Wind, 19 Jewels, 18,000 vph, Cote de Geneve, Perlage and Anglage, Raw German Silver, Unique Motor Barrel System
Functions: Hour / Minute / Seconds on Disc / Moonphase
Case: American Made, Polished 316L Stainless Steel or 18K Rose Gold, Sapphire Crystal Front and Back, 42.5 mm X 38.5 mm, Thickness 9.7 mm. Lug width 22 mm and water-resistant to 5-ATM.
Weight: 3.0 oz. in stainless steel
Keystone Hands: A keystone is a central wedge in an arch that locks all other pieces of an arch in place. It is the part of an arch that all other parts depend upon. Pennsylvania's popular nickname, "The Keystone State," refers to this necessary element. The idea for RGM's Keystone hands came from a set of hands Roland Murphy was given when he was in watchmaking school in Lancaster, PA. They were a thin set of gold hands with a Keystone on each hand. He found out from some old watchmakers that they were made by Keystone Watch Company which was in Lancaster, Pa between 1886 and 1891. Never forgetting these beautiful hands they eventually became the inspiration behind the Keystone hands he designed for RGM.
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