Waltham Factory Mainspring for 7½ ligne Model 750 No. 2266 / 2243 - Alloy

Waltham Mainspring for 7½ ligne 750 Model movements, Factory No. 2266, alloy, new in envelope. This is the equivalent of 2243 when in steel. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. See image for further details. Images do a pretty good job of representing the item.