I just repaired my Zenith Transoceanic the other day but the SW side needs some adjustment, it’s still a treat listening.
I think that is the one my late Brother had. I know it was a very old Zenith. It had an antennae which could be attached to a bus window with suction cups.
He said it only had something like 5, maybe 6 tubes. I can remember his playing it and my being amazed how good it sounded and how well it picked up.
I also remember listening to Radio Deutschland one night. They mentioned that when they first began broadcasting in the 1920s it only took 200 watts to send their signal worldwide. I think that was the power, if not it was something close to that.