ETA Caliber 2512-1

Manufacturer	ETA
Caliber Number	2512-1
Movement Type	Mechanical, manual-wind
Lignes	7.75”’
Overall Diameter	17.5mm
Casing Diameter	17.2mm
Height	2.85mm
Jewel Count	17 jewels
Beat Rate / Frequency	21,600 bph / 3 Hz
Lift Angle	52 degrees
Power Reserve	~42 hours
Escapement Type	Lever
Anti-Shock Device	Incabloc
Hand Count	2
Hand Sizes	1.2mm (hrs) / .60mm (mins)
Functions	Central hours; central minutes
Country of Manufacture	Switzerland, Swiss made
Known Models	Must de Cartier Tank (Add your watch to the comments below…)

The ETA caliber 2512-1 is a small vintage mechanical movement with 17 jewels. While this caliber was mainly used in circa 1960s~1970s, the earliest tech sheets we found were dated 1959.

2512-1 VS 2510:

There is a similar calibre 2510 with the main difference being that the 2512 has a beat rate/frequency of 21,600 beats per hour (3 Hz), and the 2510 beats at a slower 18,000 bph.

Other watch brands using this caliber as a base:

Cartier uses the 2512-1 as a base movement for the Cartier caliber 78-1. This is also the movement pictured on this page until Caliber Corner gets images of another example.

If you know of other brands using the 2512-1 with their own calibre number, please add them in the comments below…

Additional Resources:

• ETA 2512-1 tech sheets/parts list (pdf)