KBK Mainspring #3802 for Elgin 22s No. 4935 - Steel

KBK Mainspring #3802 for Elgin 22s Car and Travel Clock movements, Factory No. 4935, steel, new in envelope. See images for further details. Not very familiar with the supply house (would love to find them in a catalog) but they look like they are a factory mainspring as the envelope says. I likely have several of these so the one 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.