Howard Factory Mainspring for Howard 12s No. 552 - Steel

Genuine Howard Factory Mainspring for Howard 102 movements, Factory No. 552, steel, new in wrapper. See images for further details. Recently came across a box of original Howard Factory mainsprings, all of them in remarkable condition given their age and considering the thin paper they were wrapped in. 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.