BESTFIT Mainspring JA511 for 10s NY Standard Factory No. 7080 - Alloy

BESTFIT Mainspring MS-JA511 for NY Standard 10s Movements, Factory No. 7080, alloy, new in envelope. See image for precise mainspring characteristics. 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.