Nivaflex Mainspring for 16s Hamilton No. 318 - Alloy

Nivaflex Mainspring for Hamilton 16s Movements, Factory No. 318 , alloy, new in envelope. 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 a pretty good job of representing the item.