E88CC tube is a double triode of special quality. It is direct replacement for 6922, CCa and the russian 6N23P-EV tubes. All available tubes were made in former Czechoslovakia - Tesla Vrchlabí factory (code 32) in the period from 1966 to 1971. Tubes were tested on BM215 tube tester. Tight tolerances, vibration proof, high reliable and long life tubes with gold pins. New old stock. Will be delivered in modern white boxes.