PM Mainspring No. 81 for Kurth 10½ ligne caliber 180 - Steel

PM No. Mainspring No. 81 for Kurth 10½ ligne caliber 180 movement and perhaps others, 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.