HR Mainspring No. 540 for Oris 450 thru 454 - Steel

HR mainspring No. 540 for Oris caliber 450, 451, 452, 453, 454, 456, 457, 458 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.