Newall Security Mainspring #1805 for Benrus DM, DN, ETA 810, Arogno 260 - Steel

Newall Security Mainspring #1805 for Benrus DM, DN, ETA 810, Arogno 260 caliber movements plus perhaps similar ébauche watches, steel. See image for precise characteristics. 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.