BESTFIT Mainspring 514A for Elgin 700, ETA 2412, Benrus AE, MST 366, 389 - Alloy

BESTFIT Mainspring 514A for ETA 2412, Benrus AE, Elgin 700, MST 366, 389, KF 13.20, Gubelin A1003 plus perhaps other similar ébauche watches, white alloy, new in envelope. Someone has marked on one that they are also good in a Hamilton 750. See image for precise mainspring specifications. I have several of these so the one you get may vary 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.