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File:Vintage Emerson Clockette Table Radio, Model 157, Small 4 Tube Set, Broadcast Band Only (MW), Made In USA, Circa 1937 - 1938 (14796467398).jpg - Wikimedia Commons
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Another mysterious radio burst in space is repeating a pattern. This one occurs every 157 days | CNN
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Crosley Model A-157 (Fiver Roamio) Auto Radio Radio Service Data Sheet, October 1937 Radio-Craft - RF Cafe
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File:Vintage Westinghouse Wood Table Radio, Model H-157, 6 Tubes, Broadcast Only (MW), Circa 1947 - 1948 (14668071699).jpg - Wikimedia Commons
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