Longines Caliber L156

Brand	Longines
Caliber Number	L156
Base Caliber	ETA 255.411
Movement Type	Quartz, battery-powered
Lignes	10.5”’
Diameter	23.3mm
Height	1.95mm
Jewel Count	6
Frequency	32,768 Hz
Battery Cell	371 (see below…)
Battery Life	~25 months
Hand Count	3
Hand Sizes	1.2mm / .7mm / .2mm
Functions	Central hours; central minutes; central seconds; date at 3:00
Hacking Seconds?	Yes
Thermocompensated?	No
Country of Manufacture	Switzerland, Swiss made (V8)
Known Models	Longines Conquest Classic ladies watch (Add your watch to the comments below…)

The Longines caliber L156 is a Swiss made quartz movement based on the ETA caliber 255.411.

Battery Notes:

The ETA 255.411 which the L156 is based on calls for a battery cell number 373 (aka SR916SW). Longines calls for a 371 (SR920SW)  in watches with the cal. L156.

Both the 373 and 371 are 1.55 Volt, silver oxide cells. The main difference is the thickness:

• 373 – 1.6mm thick
• 371 – 2.1mm thick

This also means that the 371 Longines is recommending contains more power, which translates to more battery life.

Either cell will work in your L156 powered watch, but since Longines calls for the 371 and the case can accommodate the thicker cell, your best bet is to go with that.

Order 371 batteries here (your purchase supports this site).

Additional Resources:

• Longines instruction manual (pdf)