Elgin Factory Mainspring for 10s 1st Model KW Movements No. 2326 - Steel

Elgin factory mainspring Factory No. 2326 for 10s 1st model Keywind movements, steel, Tab end (see pictures), new in envelope. See images for further information. I see this model of mainspring about once or twice every 5 years so if you have an super-duper early 10s key wind that uses the tab type end this is the mainspring you need. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a marginally satisfactory job of representing the item and all items are guaranteed.