Marco Mainspring #3307 for Mido 501, 501A, AS 1111, 1179, Font 80, 190 - Steel

Marco steel mainspring No.3307 for Mido 501, 501A, AS 1111, 1179, Font 80, 190 Bulova 6AN caliber movements and perhaps many others, 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.