RN Mainspring No. 35140 for Bulova 7AH, 7AP & Benrus AC13 movements - Steel

RN steel mainspring for Bulova 7AH, 7AP and Benrus AC13 caliber movements, 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.