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    BBM 2 Chicago test pattern (year unknown)

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    epehasiia
    *.* yeahh Superbe video!
    By epehasiia5 years ago
    wbhist
    This was the second variation of this "CBS style" test pattern as used by WBBM; the first said "CHICAGO" instead of "CHANNEL 2." Its use dated back to CBS's earliest days of owning the station in 1953. The audio tone heard was approx. 414.67 Hz.
    By wbhist7 years ago