Ronda Mainspring No. 468 for Font 150 and Kurth 400, 404 & 410 - Alloy

Ronda No. 468 Ronda-Flex Alloy mainspring for Font 150 & Kurth 400, 404 & 410 caliber movements and perhaps others, alloy, 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.