Waltham Factory Mainspring for 6/0s D Model No. 2265 / 2248 - Alloy

Waltham Mainspring for 6/0s D Model movements, Factory No. 2265, alloy, new in envelope. This is the equivalent of a 2248 when in steel. See images for further details. 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.