Marathon Mainspring No. 625 for Benrus AU, AV, Font 170 - Steel

Marathon Mainspring No. 625 for Benrus caliber AU, AV and Font caliber 170 movements, and quite likely others, steel, new in envelope. See images for 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. plethora