Marco Mainspring 3275W for Longines Caliber 10.68Z (10L) & 11.68Z (11L) - Alloy

Marco alloy mainspring 3275W for Longines caliber 10L, 10LN, 10LS, 10.68Z or 10L & 11.68Z or 11L movements, and perhaps others, T-brace end, new in unsealed package. 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 an adequate job of representing the item.