ETA Caliber 2390

Manufacturer	ETA
Caliber Number	2390
Movement Type	Mechanical, manual-wind
Vibrations Per Hour	18,000 bph, 4Hz
Jewels	17
Power Reserve	47 hours
Diameter	10.5”’
Height	3.6mm
Lift Angle	52 degrees
Hands	1.50mm, 0.90mm, 0.21mm
Hairspring	Flat
Shock Absorber	Incabloc
Hacking?	Yes
Balance	Glucadur/Nickel screw balance
Functions	Hours, minutes, central seconds
Country of Manufacture	Switzerland
Known Models	Vintage manual wind Pontiac, Hamilton, too many to list – add yours to comments below.

The ETA caliber 2390 was produced in the 1970’s in Switzerland.

The movement pictured is from a vintage Pontiac dress watch. This movement was also found in several 1970’s Hamilton watches. Hamilton called their movements the Hamilton caliber 60, 688, caliber 75, etc. These base for these calibers was the ETA 2390.

It’s interesting that the List of ETA Movements on Wikipedia (link) doesn’t include the 2390.

Video Example:

https://www.youtube.com/watch?v=DlyA5vTi0Ns

Additional Resources:

• ETA Wikipedia page

Caliber submitted by wahawatches.com