RGM's first tonneau-shaped in-house movement, introduced for the brand's 20th anniversary: a hand-wound caliber built around a motor-barrel winding system, a friction-reducing American railroad-watch mechanism absent from wristwatches for over 50 years before it. The line's moonphase display is accurate to within a day roughly every 120 years.
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
