Vacuum Tubes, Inc. Hall of Shame
6L6GC #1, #2, #3 - False country of Orgin
The two tubes at left are real RCA and Sylvania 6L6GC tubes. These are followed by National and Raytheon tubes falsely branded "made in England", and then by a tube correcctly branded "made in Russia". Note the taller bulb of the Russian tube and the fact that the black base is slightly larger than the glass. I have also seen Russian 6L6GCs branded "W. Germany". The word "England" should be a red flag to a buyer. With the exception of Brimar, most British tube manufacturers labeled their tubes "Made in Great Britain".
Compare these and the fake 7581A listed in the Hall of Shame.