Pair QTL Tungsram 12AX7A ECC83 NOS NIB Short Grey Copper Grid Serious Tubes D523
Manufacturer: Tungsram for QTL(British Distributor). Plate(s): Short(14mm) Grey Ladder w/Copper Grid. But this the way of the world now. We are always looking to buy more tubes. Large collections, small collections, it doesn't matter.