Duracell Duralock silver oxide (1.55 V) made in Switzerland to replace a battery SR920SW on an old pocket watch with quartz movement "Roughing France, Besançon" aged over 30 years. Everything works perfectly for this Duracell "best before 2016".
Pile purchased from the seller "SIEFOM" based on the island of Reunion and delivered in 48 hours! Battery two to three times cheaper than in supermarkets, shipping included. Perfect! I recommend this seller.