HR Mainspring A118 - Elgin 4/0s 4789 - Steel

HR Mainspring for 4/0s Elgin, #4789, HR A118, steel, new in envelope. Note while the mainspring is new the envelope may have been handled quite a bit over the years. I have a couple of these that have the wrong factory # shown, but they are actually a 4789. See image for precise mainspring specifications. 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.