Samson Mainspring No. A7 for A.S & Mido 7¾ ligne movements - Steel

Samson No. A7 steel mainspring for A.S. 7¾ ligne caliber 1236 and Mido 717 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.