[decojoe67]

I must chime in that 48-1000 really is a choice set with that late production "double-D" screen. I had a nice typical one years ago that had frustrating intermittent audio problems that caused me to unfortunately just part with it.
Pre-war sets aside, I agree that the 1946 RCA 621TS is the top early vintage TV. It's a beauty, fairly compact and a great performer. The next one in line is the 1948 Admiral 20X122 bakelite console. It's such a compact little gem with great lines and proportions - and a flawless performer to boot!
PS - Be aware that the Dumont "doghouse" is even bigger and heavier than you might expect! That would probably be the only reason a TV collector would pass on it. I collect vintage TV's, but must pass on the early big 10"/12" sets because of space. The only exception I made was the RCA 630TS because it's such an historical set.