Kilb-Beck Mainspring #3026 for Howard 16s No. 328 - Steel

Kilb-Beck Company Mainspring #3026 for Howard 16s movements, Factory No. 328, steel, hole end, new in envelope. See image for precise specifications. Not very familiar with the supply house and would love to find them in a catalog somewhere. I likely have several of these so the on you get may differ slightly from the images. I specialize is 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.