Pennant Mainspring for 16s Ingersoll Reliance Mainspring No. 1365 - Steel

Pennant Mainspring for 16s Ingersoll Reliance Pocket Watches, Factory No. 1365, new in envelope. See images for further details. I likely have several of these so the one you get may differ slightly from the images. 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.