Gunther Mainspring for Waltham 18s No. 2204 - Steel

Gunther Efficiency Unit Mainspring for Waltham 18s, Factory No. 2204, steel, new in frail envelope. See image for precise 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 suitable job of representing the item.