McVitie Weston valve collection, Mullard valve, type D025
- Made:
- 1930
- maker:
- Mullard Limited
This image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseMullard valve, type D025, pinch marked 111V
Science Museum Group
© The Board of Trustees of the Science Museum
Mullard valve, type D025, pinch marked 111V, glass envelope separate from base, (RMW/D70 - McVitie Weston number), by Mullard Limited, 1930.
