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Visual evidence Tung-Sol 5998 = Western Electric 421 | Headphone Reviews and Discussion - Head-Fi.org
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The 5998 Tube
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Visual evidence Tung-Sol 5998 = Western Electric 421 | Headphone Reviews and Discussion - Head-Fi.org
The 5998 Tube
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NOS Tube Store: TUNG-SOL 5998
5998 CHATHAM (TUNG-SOL) 6080 A1834 6AS7 421A VALVE POWER OTL NOS/NIB
WE 421a - Black Plates from 1967 | WE 5998/421a - Grey Plates from 1954 | Chatham 5998 from 1960 | Tung-Sol 5998 from 1966 | What's Best Audio and Video Forum. The Best High End Audio Forum on the planet!
Tung Sol 5998: Vacuum Tubes & NOS Tubes | Tubes Unlimited
