BESTFIT Mainspring 615A for Movado 15, 16, 17, 19, Eterna 694, Rolex Size U, 100, 150 - Alloy

BESTFIT Mainspring 615A for Movado 15, 16,17, 19, Eterna 694, GP 60, Mido 600, Rolex U movements, caliber 100, 150 and by association 113, 160 & 161 as those are supposedly U movements as well, white alloy, new in dusty package. See image 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.