Rezista Mainspring #320BA for Font 155 & Benrus AK - Steel

Rezista Mainspring No. 320BA for Benrus caliber AK and Font caliber 155 movements plus perhaps 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.