High Quality Watch Battery RAYOVAC 391 ( SR1121w )

Recognised as one of the largest and most trusted of battery manufacturers,
Rayovac watch batteries are chosen by watch professionals the world over

This battery is a direct replacement for the following battery numbers....
Citizen 30, SR55, SR1121, SR1120w, AG8 (Alkaline cell)

The physical dimensions of this battery are
Diameter 11.6mm x Thickness 2.1 mm