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MATCHED QUAD (4) -RCA Westinghouse beansed 6550 tubes c 1960s original vintage usa NOS

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The Bonfires Vintage
Portland, OR, United States
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Original vintage c 1960s RCA (Westinghouse distributes) 6550 matched NOS quartet of the best power tubes ever made. Perfect for your vintage Sunn, Marshall, Ampeg, hifi, boutique, pro audio, or whatever project you need the best tubes ever in.
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