Marco Mainspring No. 3355 for Helbros caliber 92H & Moeris Caliber 17C - Steel

Marco No. 3355 steel mainspring for Helbros 17 ligne caliber 92H & Moeris caliber 17C (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.