Elgin Factory stem / winding arbor for 18/0s Grade 820

One Elgin factory stem for 18/0s Grade 820, new in packaging. In the Elgin factory vernacular these are called winding arbors, but everyone else just calls them stems. See images for further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. If you need a part for an American watch I likely have it. Images do a pretty good job of representing the item.