Samson Mainspring No. 10027 for Amida caliber 50 & 60 - Steel

Samson No. 10027 steel mainspring for Amida 9¾ ligne caliber 50 and 10½ ligne caliber 60 pin-lever movement and perhaps others (pretty sure it fits a caliber 49 too), new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.