BESTFIT Mainspring WA19 for Gruen caliber 570, PUW caliber 54 Automatic - Alloy

BESTFIT Mainspring with attached bridle WA19 for Gruen 570, PUW 54 caliber automatic movements perhaps similar ébauche watches, white alloy, new in envelope. See images for precise mainspring specifications. 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 a pretty good job of representing the item.