HR Mainspring No. 663 for AS 1215, 1216, 1290, 1291, Lemania S27, S27T1 - Steel

HR Mainspring No. 663 for AS caliber 1215, 1216, 1290, 1291 & Lemania S27, S27T1 caliber movements plus perhaps other similar ébauche movements as well, steel, 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 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.