These are 329 (SR731SW) Energizer batteries. Brand New & Guaranteed Factory Fresh. These batteries are commonly required for Swatch, Fossil, Timex and Casio popular brands. Energizer's reported failure rate is far less than 1/1000 of 1%. This devotion to consistent quality has led it to control over 70% of market share in Switzerland, one of the world's leading watch producing countries. Energizer is respected world wide for its uncompromising quality and consistent performance. Energizer's technological leadership produces a variety of miniature batteries which are trusted for use by the best names in watch, computer, keyless entry, consumer electronics and hearing aid industries. Additional Details ------------------------------ Product description: Energizer 329 Button Cell Silver Oxide Watch battery Energizer is a worldwide leader in small electronics batteries. Energizer offers a full line of Watch Electronic Specialty Batteries for applications used in precision engineering tools to power a wide variety of small electronic devices. Everigzer batteries are used in home health devices such as glucose monitors, blood pressure cuffs and digital ear thermometers. Also, button cells can be used in keyless remote entry systems for cars and homes. Hand held electronic devices also use batteries in calculators, watches, computers. photo camera, audio books, games, toys and more. A Cross-reference information guide is inclued in each order. Made in USA.