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E-60 Minephone26 views
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E-60 Minephone26 views
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E-60 Minephone25 views
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E-60 Minephone25 views
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Tone Control Unit27 views
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Tone Control Unit24 views
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Trainphone Communication Equipment31 views
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Trainphone Communication Equipment26 views
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Trainphone Communication Equipment24 views
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Trainphone Communication Equipment26 views
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Trainphone Communication Equipment25 views
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Trainphone Communication Equipment26 views
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Trainphone Communication Equipment29 views
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Single-Frequency Communication Equipment for Mine Locomotive37 views
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Single-Frequency Communication Equipment for Mine Locomotive23 views
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Single-Frequency Communication Equipment for Mine Locomotive24 views
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Single-Frequency Communication Equipment for Mine Locomotive23 views
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Single-Frequency Communication Equipment for Mine Locomotive20 views
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Single-Frequency Communication Equipment for Mine Locomotive23 views
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Mine Safety Appliances Minephone24 views
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Minephone with cover removed to show interior25 views
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Control Station for Millphone25 views
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Microphone for Minephone - Adjustable and Extension types25 views
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Minephone Hand Microphone23 views
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M-S-A "Telecrane" Equipment Box25 views
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M-S-A "Telecrane" Equipment Box showing Electronic Apparatus24 views
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M-S-A "Telecrane" Equipment Box without Electronic Apparatus24 views
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M-S-A "Telecrane" Transmitter-Receiver25 views
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M-S-A "Telecrane" Loudspeaker Transformer24 views
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M-S-A "Telecrane" Foot Switch26 views
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Top and underside of Unit from Shaftphone Equipment Box - Woodward Iron Co.26 views
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"Millphone" Loudspeaker24 views
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