I finally got around to picking this up, and it turns out that it's a Wizard of Wor cabinet. Apparently the previous owner, who was an arcade owner, converted it to Galaga and painted the cabinet black. The Galaga "Game Over" screen is burned into the monitor, which doesn't seem to work anymore. :/ Later it was converted into Ninja Gaiden.

Needless to say, this thing needs ALOT of work. I'll post pictures if anyone wants them.

LINK:
KLOV.com - Wizard of Wor