Coronado 25TV2439060A
   

21" screen, 1952

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With the advent of the 21" rectangular picture tube in 1952, the standard was set for the screen size of black & white consoles, a standard which would remain until the last ones were made almost 30 years later.  The 23" tubes introduced in 1960 were essentially 21" tubes with the corners pushed out.


 

 



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