VW48 / 10E/10585 tetrode
This tetrode is based on the 215SG. The valve carries the serial number C16056, and 452V in a circle near the top cap.
This would have been one of a matched set of three valves, the specification stating that the outer packaging says "for use in Wavemeters".
This file was last modified
15:16:35, Tuesday September 02, 2014