Sellita Caliber SW290-1

Manufacturer	Sellita
Caliber Number	SW290-1
Base Caliber	Sellita SW200-1
Movement Type	Automatic, self-winding mechanical
Lignes	11.5”’
Diameter	25.6mm
Height	5.6mm
Jewel Count	31
Beat Rate / Frequency	28,800 bph / 4 Hz
Lift Angle	50 degrees
Power Reserve	38 hours
Rotor Style	Ball-bearing
Rotor Winding Direction	Bi-directional (reverser style)
Hand-Windable?	Yes
Mainspring	Nivaflex
Anti-Shock Device	Novodiac or Incabloc (depends on grade)
Hand Count	3
Hand Sizes	1.5mm / .90mm / .20mm
Functions	Central hours; central minutes; small seconds subdial at 9:00; date at 3:00 (also possible without a date)
Hacking Seconds?	Yes
Quickset Date?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Aquastar Deepstar II (Add your watch to the comments below…)

The Sellita caliber SW290-1 is a Swiss made automatic movement with a small seconds complication at 9:00. This caliber is available with a date at 3:00, or as a true no-date.

Base Caliber:

This calibre is based on the SW200-1. Many parts are interchangeable between the two movements, but not all, due to the small second configuration. For customizing purposes, and SW200-1 dial can be used, but a hole will need to be drilled for the small seconds hand. The hour and minute hands from an SW200-1 can be used, but not the seconds hand.

Additional Resources:

• Official SW290-1 tech docs (pdf)
• List of Sellita watch movements