Marco Mainspring #2851 for Benrus CF, Wittnauer 11RW, ETA 1156 - Steel

Marco Mainspring No. 2851 for Benrus CF, Wittnauer 11RW and ETA 1156 caliber movements plus perhaps similar 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 a pretty good job of representing the item.