Sandsteel Mainspring for Hamilton 534B for 16s - Steel

Sandsteel Mainspring for Hamilton 16s RR movements, Factory No. 534B, steel, new in likely very frail envelope. See images for precise characteristics. These were available in a couple of different strengths and those that I can supply can be found in the drop-down list. I likely have several of thee so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.