My first thought was some kind of modded poker machine, but that's not very convincing.
Can you post a better pic of the coin door? Those often give clues, especially if there are any logos or manufacturers anywhere on them (inside or out).
I was thinking something kee games, but the coin door is wrong. It's a little like canyon bomber, but that's different too. I would guess converted poker machine.
ok this was really odd. it has some block of wood that kinda looks like a cup holder built in just above cp but i cant get it to move and dont want to break it! this thing was hard to get apart. got the monitor out only to find out the whole box slides out this is a odd cab check pics..............
Back in the day, RePlay magazine featured ads for generic cabinets for operators to install conversion kits into... I wonder if this cab was one of those?