Pair tube, 6SN7 compatible ball, smoked brown base, made in England lot: 1185 G3/1185 G3 measured value 52/52 (rejected value 50) with white box, Gm values are low, so it's cheap ※Pairs are judged based on gM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube 6BQ5 compatible ball pentode tube made in Russia, black plate, measured value 78/72 (rejection value 50) with original box ※ pair is determined based on GM values measured with test machine TV-7 (Kojima Yosuke)
Accessories: original box