McVitie Weston valve collection
- Made:
- 1933 in Canada and United States
- maker:
- Osram
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
LicenseOsram Catkin tetrode valve, type MS4B, B5 base
Science Museum Group
© The Board of Trustees of the Science Museum
Osram Catkin tetrode valve, type MS4B, B5 base, pinch marked 19 N.30, no screening can or top terminal, (RMW/G62B - McVitie Weston number), by Osram, 1933.
