BESTFIT Mainspring WA75 for Rolex caliber 620, 630 Automatic - Alloy

BESTFIT Mainspring WA75 for Rolex caliber 620 & 630 (630NA) Automatics with attached bridle, plus perhaps similar ébauche watches, alloy, new in envelope. See images for precise characteristics. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.