Set Lever Bridge for Felsa (F) 6 Ligne base caliber 21 / 21N movements

ONE Genuine Swiss Material Set Lever Spring / Setting Bridge (445) for 6 Ligne Felsa base caliber 21 / 21N and variants, new in sealed packaging. See images for all supported calibers and 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a barely adequate job of representing the item.