Marco Mainspring No. 2720 for ETA 620, 761, 765, 879, 1040, 1201, AS 945 - Steel

Marco Mainspring No. 2720 for ETA 620, 761, 765, 879, 1040, 1201, AS 945 caliber movements, 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.