An original Asteroids arcade machine.
But my brother and I removed the original (burned-in) oscilloscope screen and replaced it with an LCD panel, replaced the controls with six-button arcade fighter sticks, and hooked the whole thing up to a hacked Xbox with thousands of dumped ROMs on it. The original board was gone before we got the cab, donated to another machine that did have a working monitor.
Controversial because some arcade historians would prefer to see these cabs preserved rather than hacked. But with a burned screen and no board, this cab was pretty useless.
Adventurer_By_Trade