Amperex ECC88 / 6922 / U.S.A. – Tektronix Oscilloscope – The finest
ECC 88 / 6922. Taken out Of Tektronix Osilloscope. One Of The Finest Tubes Made. Date - Codes - 67 - 24. U.S.A. - Made.
ECC 88 / 6922. Taken out Of Tektronix Osilloscope. One Of The Finest Tubes Made. Date - Codes - 67 - 24. U.S.A. - Made.