JEWEL Mainspring for 12s Illinois Factory No. 47345 - Steel

C. Ryser JEWEL Mainspring for Illinois 12s movements, Factory No. 47345 (old #1236), steel, new in envelope. See images for further details. Dennison 11 x 3¾ x 18¼ and is not an easy number to find. 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.