Rca B&w Tv

[Adam]

What's strange is that the change between 70 - 90 - 110 degree tubes doesn't correspond to the change to more squared off corners, and seems to be much more gradual.

Looking at the sets I mentioned before:

rounder looking 17" sets = 56 Bendix - 90, 58 Hoffman - 110, 58 Sylvania - 110, 60 Zenith - 110

rounder looking 21" sets = 54 Westinghouse - 70, 56 Zenith - 70, 57 Philco - 70, 57 Emerson - 70, 58 RCA - 110, 59 Setchell Carlson - 90, 59 Olympic - 90

rounder looking 24" sets = 59 Magnavox x2 - 110

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more rectangular looking 19" sets = 61 Zenith - 110

more rectangular looking 23" sets = 61 Zenith -110, 63 Airline - 90

[Whirled One]

Lessee.... my 'library' of old Consumer Reports shows that the first 23" B&W sets were introduced for the 1960 model year, and appears to have pretty much completely replaced the more rounded-off 21" size within another year or two.