No it's not radio related, Because of the numbers shown on the dial, it is a barometer
face and it's in the same range of numbers that would be used, it's range is in millibars of atmospheric pressure. If you will notice there is a couple of letters at the top center of the faceplate, lower cased ( mb ) = millibars of mercury,
which is a column of mercury that rises and falls with a change in atmospheric pressure. Since it's a dial face it has or had gear works like a clock, and levers that were connect to a sealed bellows. That bellows expanded when the pressure dropped, and contracted when the pressure increased.
I could be way off base on the symbol of an eagle, sitting on a globe, but it reminds me of the Natzi emblem. Could also be a manufactures symbol.
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