Sellita Caliber SW221-1 Watch Movement

Manufacturer	Sellita
Caliber Number	SW221-1, SW 221-1
Movement Type	Automatic, self-winding mechanical
Base Caliber	Sellita SW200-1
Lignes	11.5”’
Overall Diameter	26mm
Casing Diameter	25.60mm
Height	5.05mm thick
Jewels	26
Power Reserve	~38 hours
Vibrations Per Hour	28,800, 4Hz
Lift Angle	50 degrees
Amplitude Range	200 degrees – 315 degrees
Shock System	Novodiac or Incabloc
Regulator System	Etachron with fine tuning device
Materials	Brass (main plate and bridges)
Rotor Type	Ball bearing
Mainpspring	Nivaflex
Hand-Windable?	Yes
Rotor Winding Direction	Bi-directional
Hand Count	4
Hand Sizes	1.90mm / 1.50mm / .90mm / .25mm
Features	Central hours; central minutes; central sweeping seconds; pointer date aka date hand
Hacking Seconds?	Yes
Quickset Date?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Revue Thommen Airspeed, Farer Lomond (Add your watch in comments below…)