Renata 371 battery OEM factory replacement battery for Marathon Watch Company

Renata 371 is the OEM factory replacement battery for Marathon quartz models (Navigator, GPQ, TSAR, and JSAR).  These watch batteries are generally considered the best watch battery by the Swiss watch industry, as they are owned by the Swatch Group and used as factory-fitted components in brands like Marathon, Tag Heuer, and Rolex. They are highly regarded for their longevity, high-quality Swiss production, and consistent performance compared to other brands.  Go OEM!