Nivaflex Unbreakable Mainspring for AS 972, 975, 997, 1000, 1006, 1061, 1177 - Alloy

Nivaflex Unbreakable Mainspring suitable for AS 972, 975, 997, 1000, 1006, 1061, 1177, Aurore 12, 39, 390, 391, 393, Helbros 44, Westfield 7AW, Zodiac 39, 734 caliber movements plus perhaps other similar ébauche movements as well, 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.