Samson Mainspring No. A37 for ETA 9¼ ligne caliber 1215 & 1216 movements - Steel

Samson No. A37 steel mainspring for ETA 9¼ ligne caliber 1215 & 1216 movements plus 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.