Selected: Quadruple Valve Co., Ltd., Nottingham
Name | Maker | Year | User | Usage | Type | Base | ![]() |
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Four-In-One | Quadruple | 1929 | Universal | Quad Tri | SPECIAL | – | 4 | – | 1 | 1 | – | – | ||
Four-In-One-3 | Quadruple | Universal | Triple T | SPECIAL | – | – | – | – | – | – | – |
2 tubes or semiconductors found.