BESTFIT Mainspring JA428 for 0s & 3/0s Illinois Factory No. 47353 - Alloy

BESTFIT Mainspring MS-JA428 for 0s & 3/0s Illinois movements, Factory No. 47353, alloy, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.