The CV6067 (commercially this is the SC1/2000) is a corona discharge voltage stabiliser for very low current EHT supplies such as would be found in oscilloscopes and Geiger counters.
The KB/WD identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the WD identifies the maker as Claude General Neon Lights, Wembley.
The serial number of 35434 suggests a significant volume production.
The high voltages require good insulation of components and thus the cathode tube is held in ceramic supports. The lower end of the central anode rod in encase in a bead of glass.
The anode connection to the top cap.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 65 mm tall.
