This is a 10433 Robinair Combination A/C temperature control tester for 1965-73 Pontiac, Chevrolet, Oldsmobile, and Cadillac models.

The tester panel has 4 sections

  Panel 1 is used on 1967-70 Pontiac and 1971-72 Grand Prix.

  Panel 2 is used on 1965-66 Pontiac, 1964-68 Cadillac, 1966-70 Oldsmobile, and 1966-70 Chevrolet.

  Panel 3 is used on 1971-72 Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac,(except Grand Prix) and all 1973 ATC equipped GM cars including Pontiac Grand Prix

  Panel 4 contains a 0-30 In/Hg. Vacuum Gauge and Selector Switch and is used with Panels #2 and #3.

Original Instruction Manual included as seen in pictures.