Item description for GLI International Model 53 Turbidity analyzer T53A4A1N Powers on, Gets Readouts

GLI International Model 53 Turbidity analyzer T53A4A1N

I wired this up to power and it gets the displays shown and I am able to advance to other screens as well. this is as far as I have been able to test it. Two of the screws that secure the face is missing (see 1st picture). Everything that is included is shown in the pictures.