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Marconi Radio Valve Type U33, by Marconi Company, England, 20th Century

Inventory Number: 77017

77017-2t 77017-1t

Date: 20th Century

Maker Details: Signed by Marconi Wireless Telegraph Co. Ltd.

Inscription: "M.W.T [LOGO] / MADE IN ENGLAND PATENTED" printed on transfer stuck to exterior surface of bulb. "U 33 / PC 4" printed on exterior surface of bulb.

Size: 110 mm in overall height (including top cap and base pins)

Materials: Glass, steel, bakelite?, assorted metals.

Other Given Number(s): Christie's 215.


Marconi Radio Valve Type U33, in vertical glass envelope, with steel top cap. Upon polished black bakelite? base with four steel base pins. Previously catalogued with assorted other valves.

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