HR Mainspring No. 959 for Helbros 17L #92H movements - Steel

HR No. 959 steel mainspring for Helbros 17 ligne model 92H (basically pocket watch) movements. See images for precise 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.