Looks like a C500 movement so it will be a CR2016 Lithium 3 volt battery (a large size 20mm X 1.6mm).
It should be good for three years if you do not use the alarm daily.
Looks like a C500 movement so it will be a CR2016 Lithium 3 volt battery (a large size 20mm X 1.6mm).
It should be good for three years if you do not use the alarm daily.
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