RCA Photophone Brass Plaque / Photophone Era Vintage sign
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RCA Photophone Brass Sign / Plaque
RCA Photophone was the trade name given to one of four major competing technologies that emerged in the American film industry in the late 1920s for synchronizing electrically recorded audio to a motion picture image. RCA Photophone was an optical sound, "variable-area" film exposure system, in which the modulated area (width) corresponded to the waveform of the audio signal.
- This wall plaque / sign is mounted on a round 1" thick board. The brass sign & board are both in VERY nice vintage condition - little cosmetic wear.
- Brass part measures 8.5 inches in diameter & the mounting board measures 12 inches.
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| Listed | 17 days ago |
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| Condition | Very Good (Used) Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more |
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