I saw one of those units - a box about 15 (or 18) inch square, where you could choose O or X, and you first or the machine ... back in 1967, when on excursion with the Scouts to the Museum of Science and Technology in Sydney [ Aus. ] - ( I think the place is now called the Powerhouse Museum ) ...
I remember a big line of people trying to beat the game, when some small boy on his dad's shoulders, calling let me try - actually beat the machine - first go !