Cartier Caliber 78-1

Brand	Cartier
Caliber Number	78-1, 78/1
In-House?	No
Base Caliber	ETA 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 Cartier caliber 78-1 is a small size Swiss made movement with 17 jewels from circa 1960s~1970s.

This calibre number is sometimes written as 78/1, however, the movement itself is signed “78-1”.

The example pictured on this page was found in a Must de Cartier ladies Tank watch with a vermeil (gold plated sterling silver) case.

Although different pieces may have different text depending on when it was produced, the example here is signed:

CARTIER INC. / 78-1 / SEVENTEEN 17 JEWELS / UNADJUSTED SWISS / SWISS / ETA shield logo under the balance wheel with 2512-1

Base Movement:

The Cartier 78-1 basically a Cartier branded ETA caliber 2512-1.

Additional Resources:

• More Cartier mentions