Quoted from slochar:Some more indepth analysis could probably reveal which game or at least family of games.
The power on self test looks like Bally system ROM -52 / -53. You can see it in the battery backed RAM U8 test.
Nuova/Bell were doing their own releases of Bally games and modified the code for extra display digits. Then they started making their own playfield layouts, one of them using Eight Ball Deluxe code as a base and got more into coding mods.
Then they moved to their own boardset which was just enhanced Bally-35 architecture (more RAM/ROM support).