HR Mainspring No. 397 for Benrus S & Venus 125 movements - Steel

HR No. 397 steel mainspring for Benrus S and Venus 125 caliber movements, new in 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.