Marco Mainspring 2885W for Gruen 754, 756, 758, Buren 30 - Alloy

Marco Mainspring 2885W for Gruen caliber 754, 756, 758 & Buren caliber 30 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.