HR Mainspring No. 414 for Benrus W & Eta 761 movements - Steel

HR No. 414 steel mainspring for Benrus W and Eta 761 caliber movements, new in (distressed) envelope. See images for precise calibers supported and mainspring specifications. 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.