Well IF I had a time machine it would very easy to "determine"!

It was not synthesized.
Slide rule dial. Like a B&W.
What else could it have been???
Commercially made transmitter. AM. 100 watt class. BLACK front panel. Seems like I recall aluminum knobs.
Not as wide as a 5100 I think, but how wide is an HT-37? That fit in about the same width.
My silly mind says it was a B&W...
Any ideas?