KBK Mainspring #4022 for Waltham 16s Factory No. 2227 - Steel

Kilb - Beck - Kuesel Inc (KBK) Mainspring #4022 for Waltham 16s movements, Factory No. 2227, new in envelope. See images for precise mainspring specifications. Not very familiar with the supply house and would love to find at catalog for them. 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.