The ETA caliber 2390 is a manual-winding movement manufactured by ETA SA in Switzerland. Introduced in 1960, it measures 23.3mm in diameter and operates at 4 Hz with Incabloc shock protection. The true no-date lever movement features a sweeping central seconds hand and served as the base for several Hamilton calibers in the 1970s.
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Diameter
23.3mm
Display Type
Analog
Shock Protection
Incabloc
FEATURES
Sweep SecondsHand Winding
