Infatigable Mainspring for AS 970, 1003, 1030, 1171, 1254, 1354 - Steel

Infatigable Permanent Power steel mainspring #569 for AS caliber 970, 1003, 1030, 1171, 1254, 1354, KFG caliber 257, 258, 270, 340, 344, FF caliber 60, Buren caliber 355, 356, 357, 358 plus perhaps others,  new in envelope. See images for precise mainspring specifications. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.