Flex-Alloy Unbreakable Mainspring for Angelus caliber 240 ALARM - Alloy

Flex-Alloy Unbreakable mainspring for Angelus caliber 240 alarm movements, ALARM side mainspring, alloy, new in envelope. See images for further data and precise mainspring specifications. Yes, it's a tiny mainspring for a tiny alarm movement. 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 an adequate job of representing the item.