RCA TK-31 Field CCU front & rear
These were a fully portable suitcase design, the rest of the equipment, the PSU, Pulse generator, switcher, master monitor, etc were all the same size and style. They could be conveniently fitted in a vehicle or arrayed at a temporary location.
Note the "flap" above the kinescope tube, this has the secondary controls under it.
Picture courtesy of "Tomtheworm" on eBay