GEC CV3789 / 417A
This GEC CV3789 is a military version of the 417A / 5842. Having black plates and gold pins, these tubes have the accuracy and depth you would expect from a fine GEC tube. The only better 417A variant is the rare and expensive Western Electric 417A. The CV stands for "Common Valve" which is a military designator for the British military. Any tubes that were designated for the military, by law, could not have the factory logo on them. Often, CV tubes would be re-labeled after decommissioning so it is possible to see a factory logo on a CV tube.
These CV3789 / 417A are in factory fresh military packaging.
From a factory fresh case of 100 pieces.