Illinois 6s Mainspring No. 47354 from S. LaRose - Alloy

S. LaRose packaged (likely Swiss made) Mainspring for 4s & 6s Illinois movements, Factory No. 47354, alloy, new in package. See images for precise mainspring specifications. This is a tough mainspring to even find in steel so when you see alloy ones, grab them while you can. I'll also note that someone has observed this is suitable for 6s Seth Thomas movements and since alloy mainsprings were never made specifically for these, this is a good option. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.