Permotone Unbreakable Mainspring #135 for Bulova 3AF, 3AL, 3AN, Benrus - Alloy

Rezista Permotone mainspring #135 for Bulova caliber 3AF, 3AL, 3AN, Font 1, 59 & Benrus P 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.