Hamilton Mainspring for 12½L Grade 628, 629, 630 - Alloy

Hamilton Mainspring for 12½ ligne Swiss Made Automatic Movements Grade 628 plus likely related calibers (629, 630), alloy with attached bridle, new in envelope. See images for further details. The grade 628 is a Buren base caliber 1282 movement therefore this mainspring will for more than just the specified Hamilton grades. 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 and all watch parts are unconditionally guaranteed. Images do a good job of representing the item.