Catalogue
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Mullard Radio Valve Type 2D4A, by Mullard, Britain. Mid 1930s
Inventory Number: 83305
Date: Mid 1930s
Maker Details: Signed by Mullard.
Inscription: "BVA [LOGO] / PROTECTED / BY PATENTS / Mullard / 2D4A / 3D8 / Y" printed on exterior painted surface of bulb. "498 2" printed on exterior surface of base.
Size: 90 mm in overall length (including base pins)
Materials: Glass, plastic?, steel, assorted metals.
Notes:
Mullard Radio Valve Type 2D4A in gold-painted vertical glass envelope. Painted surface partially flaking and damaged. Upon polished black plastic? base with five steel base pins. With BVA (British Radio Valve Manufacturers Association) stamp on painted surface.
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