NEWALL Mainspring #1681N for FHF (Font) 27, 271, AS 1031 - Alloy

NEWALL Mainspring #1681N for FHF (Font) caliber 27, 271 and AS caliber 1031 plus perhaps other similar ébauche watches (Patek 27SC is suggested), white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so theone 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.