Hamilton Dynavar 8/0s Factory Mainspring Factory No. 44433 - Alloy

Hamilton Dynavar Factory Mainspring for 8/0s Movements (747 & 748), Factory No. 44433, alloy, new in very frail 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 is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate good job of representing the item.