This Sony RM-450CE Video Control Unit has been tested to power on only, but no further.
Cosmetically this unit has some minor cracks, marks and scratches. 

The RM-450CE editing control unit is designed to make two-machine editing operation easy and effective.

the RM-450 CE has 33-pin remote control interface connectors and can be connected to 33-pin equipped editing VTRs directly.
Also 9-pin remote control interface (RS-422 serial interface) connectors are provided to allow the RM-450 CE to be connected to 9-pin equipped  VTRs.
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