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Amazon.com: Renata 379 SR521SW Batteries - 1.55V Silver Oxide 379 Watch Battery (2 Count) : Electronics
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Energizer Watch Battery Button Cell SR63, 1191SO, SR521SW, SR521, V379, Bulova 618, Citizen 280-59, Duracell D379, Energizer 379, (Pack of 5) - TheBatterySupplier.Com
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