Marco Mainspring #3278 for Eterna 691, 976, Felsa 4520, Junghans 79S, Record 130, Tissot 709 - Steel

Marco Mainspring No. 3278 for Eterna 691, 976, Felsa 4520, Junghans 79S, Record 130, Tissot 709 caliber movements, and perhaps 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.