Long before "Rock 'em/Sock 'em Robots", there was a mechanical boxing toy with fighters who could knock each other's heads off. It had a fairly substantial ring and I remember playing with it in the mid to late fifties. I have tried to find this toy for some time, but to no avail. Any help would be greatly appreciated.

Is this it??

Rock em Sock em Robots Game by Mattel - The Original Fighting Robots (http://www.playthingspast.com/mtrocsocrobo.html)