McVitie Weston valve collection, Mullard valve, type SD4

Made:
circa 1933
maker:
Mullard Limited
Mullard valve, type SD4, bronze metallising, marked DUMMY

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Mullard valve, type SD4, bronze metallising, marked DUMMY
Science Museum Group
© The Board of Trustees of the Science Museum

Mullard valve, type SD4, bronze metallising, marked DUMMY, (RMW/Y65 - McVitie Weston number), by Mullard Limited, c. 1933.

Details

Category:
Electronic Components
Object Number:
1972-141/1573
type:
valve
credit:
STC plc