BESTFIT Mainspring 613K for Mido 501, 501A, Font 80, 125, 126, 154, 125-1 - Alloy

BESTFIT Mainspring 613K for Mido 501, 501A, Font 80, 125, 126, 154, 125-1 caliber 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 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.