So my next question is, did all oil pressure gauge cars have no oil warning light?
When I first read the question above, I was confused. My reply here is only intended to make sure things are perfectly clear.
The upper row containing three small diameter holes is always, from left to right:
1. Fuel level (analog)
2. Optional clock (blanked out if no clock)
3. Engine temperature (analog)
The lower two large diameter holes, from left to right:
4a. Speedometer - only (standard, no tach)
4b. Speedometer with Odometer (tach)
5a. Oil pressure and alternator current - both analog (standard, no tach)
5a. Tachometer with low oil pressure and low alternator current warning lights (tach)
The low oil pressure and low alternator current warning lights are located above the red arrows in the attached picture.