Knights In Armor © 1976 Project Support Engineering.
Two knights challenge each other in a jousting contest. Players choose either The Black Knight or The White Knight and battle each other in a series of eight, ten or twelve jousts.
Released in June 1976. In a way, this game it the first 1v1 fighting game, although all each player does is control the angle of their lance. For actual punching an opponent, that honor would fall upon Sega's Heavyweight Champ, which was released later that year.
Machine's picture.
"Bhutani joins P.S.E." - Play Meter Magazine, July 1976, pg. 38