WATCH-CRAFT Mainspring 3953W for AS caliber 340 and similar - Alloy

WATCH-CRAFT Mainspring 3953W for AS caliber 340 movements, including numerous other 10½ ligne AS ébauche movements including calibers 302, 307, 311, 313, 324, 546, 549, 569, 595, 603, 621, 629, white alloy, new in envelope. See images for all supported calibers and precise mainspring specifications. I specialize in 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.