Tru-Power Mainspring BU28 for ETA 1306, 1310, Eterna 1319, Felsa 279, 282 Automatics - Alloy

Tru-Power Mainspring with attached bridle BU28 for ETA 1306, 1310, Eterna 1319, Felsa 279, 282 automatic movements plus perhaps similar ébauche watches, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is 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.