Samson Mainspring No. A30 for Buren caliber 525 - Steel

Samson No. A 30 steel mainspring for Buren caliber 525 automatic movements and perhaps others as well, 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.