Hamilton Dynavar 14/0s Factory Mainspring No. 717440 - Alloy

Hamilton Dynavar Factory Mainspring for 14/0s Movements (982, etc), Factory No. 717440, alloy, new in frail envelope. See image for further details. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.