Sellita Caliber SW221-1

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…)

The Sellita caliber SW221-1 is a Swiss made automatic movement with a pointer date style calendar complication.

Based on official technical documentation, this movement has been in production since at least May 7, 2013.

This movement is considered to be an ETA clone and is basically a Sellita version of the pointer date variation of the ETA caliber 2836-2.

Drawings:

Additional Resources:

• Sellita SW221-1 official tech sheets (pdf)
• Sellita Grades and the differences
• More Sellita watch movements