RAYOVAC 364 ( SR621sw )
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 280-34, SR60, SR621SW, AG1(alkaline cell), RW320, D364, 31, SB-AG
The physical dimensions of this battery are
Diameter 6.8 mm x Thickness 2.1 mm