Swartchild Black Shield SUPER Mainspring for Felsa 415 & Bulova 11AAC - Alloy

Swartchild Black Shield SUPER Mainspring for Felsa 415 and Bulova 11AAC as well as a few other Felsa and Langendorf movements or similar ébauche watches, white alloy. I likely have several of these so the one you get may differ slightly from the images. See images for precise 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.