Vintage WWII 1940′s Type CAY 47153A NAVY Aircraft Transmitter Radio Tuning Unit. This interesting piece of military history would make a wonderful addition to any military collection and would certainly be a great conversation piece. It has the original steel case. All the dials, inscriptions, hardware, original specification plates are in great condition. The outer steel case has some wear and dents as expected from age and use. I have no way of actually testing this tuning unit and would not want to damage any of the components. This is very heavy and weighs a little over 18 pounds.