McVitie Weston valve collection, Siemens-Halske triode valve
- Made:
- circa 1917
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
LicenseSiemens-Halske triode valve
Science Museum Group
© The Board of Trustees of the Science Museum
Siemens-Halske triode valve, (RMW/B159B - McVitie Weston number), by Siemens & Halske Norsk, c. 1917. German services triode probably used in World War I.
