ETA Caliber 2688

Manufacturer	ETA
Caliber Number	2688
Base Caliber	ETA 2681
Movement Type	Automatic, self-winding mechanical
Lignes	8.75”’
Diameter	19.4mm
Height	5.35mm
Jewel Count	17
Beat Rate	21,600 vph, 3 Hz
Lift Angle	51 degrees
Power Reserve	38 hours
Rotor Style	Ball-bearing
Hand-Windable?	Yes
Anti-Shock Device	Incabloc
Regulator	Etachron with micro-adjuster
Hand Count	3
Hand Sizes	1.2mm / .70mm / .20mm
Functions	Central hours; central minutes; central seconds; day/date at 3:00
Hacking Seconds?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	(Add your watch to the comments below…)

ETA caliber 2688 is a smaller ladies size automatic watch movement with a day/date complication. This caliber is part of ETA’s 2600 family of movements and was categorized as a Mecaline movement when it was produced. Official technical documentation was found dated as far back as 2005, with updates as recent as 2010.

ETA 2688 Tech Sheets (pdf):

Additional Resources:

• More ETA watch movements