Robusta Mainspring No. 1081 for Felsa calibers 66 – 170 - Steel

Robusta No. 1081 steel mainspring for Felsa caliber 66 thru 170 movement and perhaps others, new in envelope. 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.