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Polytone R. S. Modulator
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R. S. Modulator back
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R. S. Modulator
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R. S. Modulator
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R. S. Modulator
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R. S. Modulator
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Manufacturing date?
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Circuit board + switches
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Board components
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Board (left)
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Board (center)
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Board (center)
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Board (right)
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"Speed" pot
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"Intensity" pot
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"On/Off" switch
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"Chorale / Fast" switch
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"Modulator / Normal" switch