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Timing matters a bit here because this is vintage tube stock, not a current-production replacement, and the value is mostly about scarcity plus whether you’re buying for real use or just to park a collectible. At US$395, it lands just under the US$419 median and above the US$385 25th percentile, so this reads as fair to slightly favorable rather than a bargain-bin score.
The upside is obvious if the tube is genuinely NOS and tests strong: GEC-branded British output tubes are well regarded for musical, authoritative tone, and the CV1947/EL37/KT66 family has a serious following among tube-amp owners and collectors. The main buyer focus is verification—make sure the exact version, getter structure, plate style, and test results match the description, since with rare tubes the price is driven as much by authenticity and measured condition as by the label itself.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
GEC, the General Electric Company, traces its origins to 1886 in London, when German-Jewish immigrant Gustav Binswanger (later Byng) established an electrical goods wholesaler that evolved into the General Electric Apparatus Company. Joined by Hugo Hirst, the firm incorporated as a private limited company in 1889 and rapidly expanded, opening its landmark Witton Works factory near Birmingham in 1902. By the early 20th century, GEC had become a cornerstone of Britain's electrical industry, supplying everything from lamps and meters to wartime radios and searchlights, cementing its heritage as a pioneering industrial giant.
In audio and hi-fi, GEC focused on consumer electronics like radios under the Gecophone brand from 1922, later simplified to G.E.C. in 1930, and innovative metal cone loudspeakers introduced in the early 1950s. These alloy cone drivers represented cutting-edge technology, outperforming contemporaries in musical reproduction. The company also produced valve table receivers, such as the 1959 BC402 model, alongside broader electronics like televisions, though hi-fi components formed a niche within its vast portfolio.
Today, GEC holds a vintage-collector position in the hi-fi market, revered by enthusiasts for its mid-20th-century speakers and radios rather than modern high-end or mid-tier production. No longer active in contemporary audio manufacturing, its legacy appeals to niche buyers seeking rare, historically advanced pieces that capture Britain's postwar audio innovation.
See all GEC listings on RADAR.
