This is a new set of five #364 (SR621SW) Renata watch batteries,1.55V,Size 6.8X2.1MM •These batteries are commonly required for Swatch, Fossil, Timex and Casio,TISSOT popular brands •Renata has first hand knowledge of what a high quality watch battery must stand for •Optimized volume/capacity ratio •Dimensional precision and stabilityRENATA