Nivaflex Unbreakable Mainspring for Lanco caliber 2 - 9 - Alloy

Nivaflex Unbreakable mainspring G227 for Lanco (Langendorf) caliber 2 to 9, alloy, new in envelope. See images for precise mainspring specifications. Ya, it says Lanso but that's clearly a misprint.  I likely have several of these so the one you get may differ slightly from the images.  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 OK job of representing the item.