Simply Choose Brand (either to match existing or because you want to upgrade) from the drop down menu above. Sony no longer market watch batteries and are now known as Murata All batteries are the same size and voltage, just the brand is different. We recommend the use of these Silver Oxide in watches which will provide a more stable operating environment. Technical Details: 1.55v Nominal 7.9mm Diameter x 2.1 Known as:362 SR721SW SR58 TIMEX S 280-29 SB-AK.
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