Marco Mainspring No. 3190 for Benrus / Central AK & Font 154, 185 - Steel

Marco No. 3190 steel mainspring for Benrus / Central caliber AK and Font caliber 155, 154-1 & 185 plus perhaps others. 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.