Geneva Watch Material DURA-LOY Mainspring for Hamilton 6/0s No. 1721, 1921 - Alloy

Geneva Watch Material DURA-LOY Mainspring for 6/0s Hamilton, Factory No. 1721 - 1921, alloy, new in envelope. See images for further details. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.