Emerson 25A, 1933 Tube complement: 39 RF, 36 detector/1st audio, 38 audio output, 37 rectifier.  The type 37 tube is a triode, but here it's used as the AC line rectifier, wired with its grid and plate tied together. Approximately 11 inches / 28 cm wide at the base.  The knobs pictured are not original. The rear view.

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