PERMA-LOY Unbreakable Mainspring for AS 1023 - 1030, Benrus AF - Alloy

PERMA-LOY Unbreakable Mainspring for Benrus caliber AF, AS caliber 1023, 1030 movements plus perhaps other movements as well, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ very sightly 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.