Special R-390A PTO Manufacturers

Some of the more rare but very desireable PTOs *

And last but not least...

Some models of the R-390A manufactured with the above PTOs have an additional control on the front panel. It is believed to be a tone control. The more the control is pulled, the more mellow the sound. The nomenclature tag was relocated for this control.

Here is a close-up view of the 807 level meter

* It has been rummered that these rare radios had an 807 hidden somewhere inside.

(Yes - these were all different receivers placed in the exact same location. Really...)