i think that's the model that my dad had circa 1957, and I got it when I was about 16 (1967). Fond memories!
EDIT: Wrong model. His was mono with a multiplex output.
it could be the right model - this one is also mono w/a mpx out. it says "stereophonic", cuz you can operate am on one channel and fm on the other. (notice the "selector" switch.) some stations did this in the early days of stereo - broadcasting one channel on am & the other on fm, before fm stereo.
you'd be surprised how many wintage tubed tunas are like this - they say "stereo" but they are not really, w/today's broadcasts - you need a mpx decoder.
it's been up & running 24/7 now for a little over a week, and it is sounding mitey-fine, thru a relatively modern studio-12 fm mpx decoder...