WWII HRO RECEIVER RACK MOUNTING VERSION
The title HRO is said to have originated as a result of the initial title HOR standing for 'Ham Operators Radio' this was said to be not acceptable due to it's other interpretations, so the letters were changed to HRO.
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Another story relates to the fact that it was required to be designed and developed in a very short time, and was given the nickname 'Hell of a rush' again HOR presented the same problem.
Which story is true is debatable. However the set itself with its interchangeable tuning coil sets and its superb tuning mechanism made it one of the most sort after sets by radio amateurs after the war.