72h power reserve
The ETA A31-L11 is an automatic movement manufactured by ETA SA in Switzerland, based on the established ETA 2892-A2. It delivers a 72-hour power reserve thanks to an upgraded mainspring alloy and features a ball bearing rotor. The movement incorporates a silicon hairspring for improved magnetic resistance. Longines uses this caliber as the base for its L888 and L888.4 calibers, and it remains in production for various Swatch Group brands.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Power Reserve
72h
Display Type
Analog
Rotor Type
Ball Bearing
FEATURES
Silicon Hairspring
