Yes it's a catalin I believe it's a 66X-8. Nicknamed the Tuna Boat. Have no idea how it got that nickname. Surprisingly, it works better on SW than it does AM for right now. Just got an original antenna in the mail today along with a couple of 12SQ7s. So I'll replace the trash antenna and the weak 12SQ7 that's in it now. You're RCA radio probably has a similar chassis just no SW.
The Sharp is a Japanese made radio doesn't mean it wasn't built to somebody else's specification. It's a nice radio.
The TransOceanic is a G500. It's my favorite of the series, either tube or solid state. I think it's the best looking TransOceanic ever made. Without going to look, I believe you're correct on the model number of the Zenith. I actually like the bulls eye tuning better than I do the. It was a pretty forlorn radio when I first saw it. Somebody had painted it white and then added gold highlights. The only thing good about that is that it preserve the knobs and the veneer. I had a couple of the 262s. Those are also nice. Radios. One of them actually came with its original box.
Collecting Telechron clocks is another thing I do
I think the "
tuna boat" thing is due to the large size, but yeah, it doesn't make a whole lot of sense. Not sure why it wouldn't work as good on AM as it does on SW, since high frequencies are usually harder to manage with tube circuitry than the lower ones in the AM broadcast band. The 2X621
does have a shortwave band; they just moved it above the AM scale on the dial glass for some reason. Covers a wider range of frequencies than your 66X-8, though there's definitely something to be said for bandspread on these dials.
I'm not saying that Grundig built the radio for Sharp, but rather that Sharp seems to have 'borrowed' some aspects of Grundig's "Ocean Boy" sets, including the multiple vertical dial scales. Of course, Grundig seems to have "borrowed' the rotating drum dial scale from Zenith's
Royal 1000 T-O for their original
Satellit models, so there was a fair amount of "inspiration" going on at the time.
The G500 is a fine set, and a transitional milestone for Zenith as they switched from loctal to miniature tubes in the T-O line, and simplified the circuitry to save battery life while still offering high performance. As for the 1937 Zeniths go, I haven't seen "target tuning" in action, so I can't tell you which I prefer. I do like the look of a tuning eye in action; my 9S262 has a boring old 6U5 or the like in place of the intended
6T5, which is a bummer for me. It's a shame that the 6T5 wasn't produced for very long, as I think has one of the coolest-looking round eye tube patterns ever, giving a true "bulls-eye" effect instead of the weird shadow wedge of most other round eye tubes. Fortunately, someone has come up with a
solid-state version, which may be an option for my 9S in regards to making it look closer to original: