NuTemper Mainspring for Waltham Model 750, No. 2443 - Steel

NuTemper Mainspring #599 for Waltham Factory Model 750, No. 2243, Hole end, steel, new in envelope. See images for precise mainspring specifications. 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.