Marco Marshalloy Mainspring 3886M for Elgin 857, Winton 92-17, Zentra 76, Font 2124 - Alloy

Marco Marshalloy Mainspring 3886M for Elgin Grade 857, Winton caliber 92-17, Zentra caliber 76 movements which are all Font caliber 2124 based movements, white alloy, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.