Hi, maybe some of you guys can help me out. I have a real nice what I think is a z balancer but it has a m-c and s-2 cast into the outer ring. Has anyone ever seen this? I looked at my 3 z28's and none of them have this. I even took a mirror and looked on the back of them. None of them have this. I would really like to use it since it has no hammer marks and one that is on one of my cars looks like King Kong got a hold of a hammer. Thanks

Mine has F 1, 6 2, and a 2 with a diamond shape next to it, all on the back. Not sure what any of it means. Also there is a 7708 stamped on the front.
Good luck,
Doug