Sandsteel Mainspring for 7½ ligne Model 750 Factory No. 2243 - Steel

Sandsteel Mainspring for Waltham 7½ ligne Model 750, Factory No. 2243, Steel, new in envelope. See images for precise mainspring specifications. These were available in a couple of different strengths and those that I can supply can be found in the dropdown list. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a satisfactory job of representing the item.