HR Nivastar Unbreakable Mainspring G227 for Langendorf caliber 2 - Alloy

HR Nivastar Mainspring G227 for Langendorf (Lanco) caliber 2 movements, plus perhaps other movements, alloy, new in envelope. See images for precise mainspring specifications.  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.