Ewing Bros Mainspring for Howard 12s No. 552 Made by Waltham - Steel

Howard Mainspring for 12s, Factory No. 552, hole end, sold by Ewing Bros supply and made by Waltham, steel, new in envelope. This is not the first time I've run across a mainspring that Waltham made for a competing brand. Still it's a nice quality mainspring - and cheap too! 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 but perhaps incomplete job of representing the item.