RAYOVAC 397 ( SR726sw )
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 28, SR726, SR59, SR726W AG2(alkaline cell)
The physical dimensions of this battery are
Diameter 7.9 mm x Thickness 2.6 mm