T4540
The Tektronix T4540 is a rectangular 3⅜" × 3⅞" flat-faced CRT used in the 454 scope.
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both is T4540, but not same envelope and part-number
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The Tektronix T4540 is a rectangular 3⅜" × 3⅞" flat-faced CRT used in the 454 scope.
both is T4540, but not same envelope and part-number