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Vecchia Radio A Tubo A Vuoto Allinterno - Fotografie stock e altre immagini di Amplificatore - Amplificatore, Analogico, Anno 1950 - iStock
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File:Vintage Zenith Trans-Oceanic Multi-Band Tube Radio, Model Y600, Heavy-Duty High-Quality Construction, 5 Vacuum Tubes, Circa 1956-1957 (13787307703).jpg - Wikipedia
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File:Vintage Clear-Tone Portable Tube Radio, Model P211, 4 Vacuum Tubes, Made In Japan, Circa 1959 (14602331949).jpg - Wikimedia Commons
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