Sandsteel Mainspring for Howard 12s No. 552 - Steel

Sandsteel Mainspring for Howard 12s movements, Factory No. 552, hole end, steel, new in frail envelope. See image for further details. These were available in several different strengths and those that I can supply can be found in the drop-down list. 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 and all watch parts are unconditionally guaranteed. Images do a barley adequate good job of representing the item.