HR Quick Fit Mainspring K845 for Record 435 B (Ball) 16s Pocket Watch Movements - Alloy

HR Quick Fit Mainspring K845 for Record caliber 435 B, "Ball" (The Ball Company, Swiss) 16s Pocket Watch movement, white alloy, new in envelope. See images for precise mainspring specifications and further helpful information. 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 pretty good job of representing the item.