You might remember a plastic toy called "Rock'em Sock'em Robots" ("Raving Bonkers Fighting Robots" in the UK) in which two robots were fixed on either side of a platform and pressing buttons caused them to punch each other senseless until one of their heads popped up, only to be reset for another go. That's pretty much the same idea here, though this game appears to be based on a Tomy toy from the same era and sold as "K.O." by Parker Bros.; in which the plastic figures look like human boxers and get knocked backwards some pre-set number of times before a winner is declared.
