A very nice EX EQUIPMENT device Brimar white print badged GZ34 although Mullard Manufactured carrying the date code of f32 B9L2 The black base is tight to the envelope and the pins are clean and uncorroded, . The device tests as FULL EMISSION using our AVO VCM163 valve tester.
A great rectifier, globe envelope, mesh anodes, Osram, 1930s U10. This device is superb showing full emission when tested on out AVO VCM163 for each diode section. Carries a large maroon Marconi decal as shown.