Zounds! What a treasure. There can't be many of those left floating around.
I see family resemblances to the chassis in my 661-P console, and some significant differences.
These sets make very nice picture (and audio), as you say.
My 661-P has two power transformers (and LV rectifiers). One of the transformers has a switch on top, presumably to adjust for different line voltages.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html