BESTFIT Mainspring 513E for Gruen 915, AS 1320, 1322, 1393, 1456, Phenix 89 - Alloy

BESTFIT Mainspring 513E for Gruen 915, AS 1320, 1321, 1393, 1456, Buser 20, Lavina 115, Phenix 89, 90, 250 - 253 caliber movements plus perhaps similar ébauche watches, white alloy, new in envelope. I likely have several of these so the one you get may vary slightly from the images. See image for precise characteristics. 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.