Before RADAR became available, the calibrated speedo was used to 'clock' or pace the speed of moving vehicles. When RADAR first became popular with police it was stationary only, so these speedo were used well into the 70s.

The interior and exterior of this car look very sharp.

My only question is why is there an extra speedometer above the controls for the lights / sirens? I recall the Milwaukee Police had something similar to that in their patrol cars in the 70's & early 80's.

Thanks for the pictures and response.