Marathon Mainspring #9285 for Benrus AK & Font 155 & 185 - Steel

Marathon steel mainspring No. 9285 for Benrus AK plus Font 155 & 185 caliber movements plus perhaps other similar ébauche wrist watches. See images for precise mainspring specifications. I specialize is 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.