379 SR521SW

Replaces:  379 SR521SW TIMEX JA V520 618 SB-AC 280-59 SR63

Cell Size: 5.8 x 2.15 mm [0.228 X 0.085 Inches] 1.55 Volts

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Silver Oxide cells will offer a more stable discharge pattern than alkaline, essential for longer life and performance, in precision instruments such as watches.