Jurgensen Mainspring #546 for Waltham Colonial B No. 2237 - Steel

Jurgensen Mainspring #546 for Waltham Colonial B Movements, Factory No 2237, steel, new in envelope. See images 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 satisfactory job of representing the item.