Waltham Factory Mainspring for 6/0s Jewel & '42 Series No. 2226 / 2276 - Alloy

Waltham Factory Mainspring for 6/0s Model 1898 Series movements to 1942 ('42) movements, Factory No. 2276, alloy, new in envelope. When it's a steel mainspring it's a 2226, but as this is an alloy its a 2276. Some of these have goopy sticky protective substance on them so they'll definitely need cleaning before use. 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.