NuTemper Mainspring - Waltham 2243 (Hole) for Model 750 - Steel

NuTemper Mainspring - Waltham Factory No. 2243 - Hole - for Model 750, NuTemper #599 Steel. See image for precise characteristics. 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.