RAYOVAC 321 ( SR616SW )
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 73, IEC SR65, SR616sw, RW321, D321, 280-73, SB-AF/DF
The physical dimensions of this battery are Diameter 6.8 mm x Thickness 1.6 mm