The Broken Joystick

I picked up a new cabinet today to house my vertical multigame PCB. Found it on Craigslist locally. It’s JAMMA and plays blind – will have to see if I can get the monitor to work – if no, I have an extra working monitor. It will be a fun project to convert. Anyone know what cabinet this used to be? I suspect Atari but I couldn’t figure out which one.

Also, it had a weird converter card in it that says Dynamo:

Anyone seen one of those before?