This listing is for a (1) brand new sealed Renata Battery # 321. Cross Reference Interchangeable With: 611, 280-73, GP21, SR616SW, 38, SB-AF, SB-DF, DA, DPV, 540, SR65, S34. Renata premier manufacturers of batteries for watches, calculators, pens, toys, computer, and many other hand held devices. Renata Button battery (Button or Coin) cells are at top of the world with a reported failure rate of less than 1%, consistent high level of quality for the hobbyist, jeweler, jewelry store, or whole sale consumers. Renata's comprehensive assortment of over 40 different watch battery types, mostly of the silver oxide 1.55 V system, offers a suitable power source for any electronic device requiring an ultra-compact, long lasting, low voltage power source. A network of dedicated importers and distributors in some 100 countries world-wide make RENATA watch batteries readily available to the watch repairer and horologist almost anywhere. Renata 's professional expertise is worth having on your side. And in your watches. Thanks to its close association with Swiss watch industry; RENATA has first-hand knowledge of what a high quality watch battery must stand for: An optimized volume/capacity ratioDimensional precision and stability High capacity retention on storage (low self-discharge) Excellent reliability thanks to a uniformly high quality levelConstant availability This is brand new SEALED battery. Battery is sealed with very very thin plastic, which may tear in transit. Please forgive me if that happens. I assure you that all batteries I sell are brand new. Thanks