The case is an ex-military test equipment case.
The 1200 MHz / 430 Mhz link / remote base radio is a Kenwood TM-833 mounted to the top of the internal panel. Power and coax are fed through the panel to the inside of the case, the white cable is for the audio/PTT connections. The lid can be removed.
Inside the case, under the top panel are the two UHF GE MVP radios, one for Rx and one for Tx. The 6 cavity notch duplexer is in the back. The Black box is a 3 band "triplexer" for 2m/UHF/1200 MHz. All radios are routed through the triplexer to one common antenna connection on the top panel. The control system goes on top of the Rx MVP on the right side.
Front view with the power on.
Top view. After the test equipment was stripped from the case, the top panel was painted gray. Various switches, LED's, and connectors are mounted in existing holes. The cooling fan is in the back middle of the chassis. Existing connector holes are used for air circulation.
