The fact that the word "Nintendo" is misspelled would lead me to believe it's a homemade deal. Like someone else said I suspect whatever's written in red where it says "Player 1" and "Player 2" would identify what it used to be. A couple of people said poker machine but it reminds me of some of the old trivia games I used to see in bars around here.

What game is it playing? That would narrow it down as to whether it's a playchoice 10 or not. Ask the guy how you switch games, that will tell you for sure. If he opens up the back and there's an NES inside, that would point to a homemade job ...