KBK Mainspring #3014 for Hampden 12s No. 12696 - Steel

Kilk-Beck-Kuesel Company Mainspring #3014 for 12s Hampden movements, Factory No. 12696, steel, new in envelope. See image for precise mainspring specifications. Not very familiar with the Kilb-Beck-Kuesel supply house and would love to someday find them in a catalog somewhere. 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.