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hp: 412A (412 A); D.C. Vacuum Tube Voltmeter

Martin Renz Ernst Erb Vincent de Franco Martin Bösch Mark Hippenstiel Bernhard Nagel Otmar Jung Heribert Jung Eilert Menke 
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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » hp: 412A (412 A); D.C. Vacuum Tube Voltmeter
Thomas Bavis
USA  Articles: 16
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11.Aug.06 22:38

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