Swisscraft Mainspring No. 1641 for Font caliber 80 movements - Steel

Swisscraft mainspring No 1641 for Font caliber 80 movements plus perhaps similar ébauche watches as well, steel, new in envelope. See images for further data 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.