ASI
Spin panels in the days when Dunsfold was used to test aeroplanes not motor cars had three things:
A pair of red and green lights to show your direction of roll
A turn and slip to show your direction of yaw
A decent unambiguous altimeter
Surprisingly it may be difficult to be sure whether you are spinning errect or inverted just by looking out of the window. The roll lights being opposite in sense to the turn needle show you to be inverted. The use of the altimeter is obvious.
Double zero might have a spin panel photo for you.
JF