BESTFIT Mainspring 5516W for Rolex caliber 1400 - Alloy

BESTFIT Mainspring 5516W for Rolex caliber 1400 movements plus perhaps similar ébauche movements, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ 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.