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1956 Western Electric 421a Vacuum Tube Great Condition 4 OTL Amp Valve Electron – DREAM T.E.A.M.S.
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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!
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Magic Moment: My new WE tube amplifier with P&C transformer Part 2
1960s New Old Stock Tube Day - Bottlehead Crack OTL sporting a Tung Sol Branded 421A 5998 variant from 1965 paired with a 1961 Amperex Bugle Boy 12AU7 from the Philips Heerlen,
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Glow in the Dark Audio - Oliver Sayes Western Electric 421a
![True NOS NIB Western Electric USA 421A [5998 6AS7G] Domino Plate 3 Mica Tube | Reverb Italia](https://rvb-img.reverb.com/image/upload/s--FbTBnYp4--/f_auto,t_large/v1557765962/sebjnrgxsvgbil0gksoe.jpg "True NOS NIB Western Electric USA 421A [5998 6AS7G] Domino Plate 3 Mica Tube | Reverb Italia")
True NOS NIB Western Electric USA 421A [5998 6AS7G] Domino Plate 3 Mica Tube | Reverb Italia
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Western Electric 421A dual triode tube - grab 'em while you can Photo #4552359 - Canuck Audio Mart
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5998 / 421A - Vint'Elec - Vintage electronic tubes
western electric WE421A (double triode popular power tube) – ビンテージオーディオ専門店 ペガサス
Visual evidence Tung-Sol 5998 = Western Electric 421 | Page 4 | Headphone Reviews and Discussion - Head-Fi.org
