BESTFIT Mainspring JA761 for Waltham 6/0s Factory No. 2248 - Alloy

BESTFIT Mainspring JA-761 for 6/0s Waltham, Factory No. 2248, alloy, new in envelope. See image for precise 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 and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.