Japanese 6BM8 / ECL82 Matched Quad
We believe this excllent 6BM8 was made by Matsushita in Japan. Matsushita had technical licensing from Mullard, and they produced excellent high quality tubes. This batch was an OEM for a manufacturer, so it is not marked as Matsushita or Panasonic.
Price is for a quad (4 tubes) with pentode conductances matched.