Marco Marshalloy Mainspring 3051M for ETA 1228, Eterna 1225, Glycine 166, Hamilton 653, 655 - Alloy

Marco Marshalloy Mainspring 3051M for Boulevard 970, 971, Concord 500, ETA 1228, Eterna 1225, Glycine 166, Hamilton 653, 655, Jules Jurgensen 47, 116, Record 174-1, 174M, 174M1, Winton 98 caliber movements plus perhaps others, white alloy, new in envelope. See images for precise mainspring specifications. 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.