Marco Mainspring #3344 for Valjoux caliber 23, 23C & 72, 72C Chronograph - Steel

Marco Mainspring No. 3344 for Valjoux caliber 23, 23C & 72, 72C Chronographs plus perhaps similar ébauche watches, 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.