Robusta Mainspring No. 1185 for Marvin 5¼ ligne caliber 150 - Steel

Robusta No. 1185 steel mainspring for Marvin 5¼ ligne caliber 150 bracelet movement and perhaps others, steel, 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.