Ronda Mainspring No. 441 for Precimax caliber 400, 450, Forester caliber 800 - Alloy

Ronda No. 441 Ronda-Flex Alloy mainspring for Precimax caliber 400, 450 & Forester caliber 800 movements and perhaps others, new in sealed 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.