Vintage E88CC Tesla tubes are double triodes of special quality. It is direct replacement for the 6922, CCa and the russian 6N23P-EV tubes. Available tubes were made in former Czechoslovakia - Tesla Vrchlabí factory (code 32) in year 1974. Tight tolerances, vibration proof, high reliable and long life tubes with gold plated pins. New old stock, will be delivered in modern white boxes with measured parameters attached.