Soft 404
Mine has virtually the same functionality and controls:
Also the PCB has the same look and feel. They aren't identical but from the same period.
Short review: Humble LAB equipment: METEX MS-9150 4-in-1 Test Setup
> It appears your unit will read out the function generator's frequency on the counter with out routing a patch cable to one of the inputs.
Yes. There's a button to route the signal up to the counter: