HR Mainspring No. 650 for Precimax (PX) caliber 300 - Steel

HR mainspring No. 650 for Precimax / Helios (PX) 13 ligne caliber 300 movements plus perhaps similar ébauche watches as well, 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 a pretty good job of representing the item.