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30 line set with speaker (`1929-30) |

Specifications |
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Laboratory Model
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Simplified Version |

Specifications
People's Television Viewer (1929)
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"Universal" Television Viewer (1930)
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Large Television Viewer (1930/31)
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90 Line Mirror Screw Viewer (1932)
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90 Line Mirror Screw Viewer with Stepped Point Light
Source (1932-33)
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180 Line Mirror Screw (1934)
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180 Line Mirror Screw with Kerr Cell (1935)
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