Sandsteel Mainspring for Hamilton 10s No. 6021 - Steel

Sandsteel Mainspring for Hamilton 10s movements, Factory No. 6021, steel, new in envelope. See images for precise mainspring specifications. These were available in a couple of different strengths and those that I can supply can be found in the drop-down list. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a suitable job of representing the item.