399 SR927W
Replaces: 399 SR927W TIMEX W V543 613 SB-BP 280-44 SR57
Cell Size: 9.5 x 2.73 mm [0.374 X 0.107 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.