I'll be happy to defer to the experts, but my cabinet is a uniform color from top to bottom. Of course, now it has been refinished, but I just looked at cabinet photos in its as-found condition and there's no indication that there was darker toning anywhere near the bottom (or anywhere, period).
As you've probably noticed from examining interior areas protected from sun fade, the original color was rather reddish.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html