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The corners are cut off by the shape of the screen, but they're still there on the edges of the glass. If you see a B&W round tube with a little bit of phosphor residue on the sides of the glass, you can actually see the corners of the picture. On a color roundie, you wouldn't be able to see the corners due to the shadow mask and other internals.
I believe that broadcasters would avoid putting anything important in the corners. Steve D might be able to elaborate on this, but I don't think they tried putting anything like icons in the corners 'til the 90s.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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10-20-2007, 12:53 PM
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