The way the base is angled is just weird. It's not even 45 degrees.
Do the switches actually sit at the same angle, or are they in the same orientation as the main joystick mounting plate?
If at an angle, it would almost have to be designed for a specific cabinet.
Virtua Fighter had the joysticks at weird angles, but none of the pictures I found look like those joysticks.
That grommet looks old school.