HR Mainspring SA352 for 16s Howard No. 328 - Alloy

HR Mainspring SA352 for Howard 16s Movements, Factory No. 328, hole end, alloy, new in envelope. See image 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.