BESTFIT Mainspring 711H for Gruen 587, A. Michel 290, 291, Precimax 400, 450, Gruen 580 - Alloy

BESTFIT Mainspring 711H for A. Michel 290, 291, Precimax 400, 450, AS 574, 602, 616, 637, 663, 699, Universal 260, 261 and Gruen 580, 581, 582 plus perhaps other similar ébauche watches, white alloy, new in envelope. See image for precise characteristics. 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.