Mullard Valvo E80CF 7643 for McIntosh MR-67 65B 71 Platinum matched pair

One platinum matched pair (2 tubes) E80CF 7643 made by Valvo in Hamburg plant in West Germany, rebranded MULLARD. They are carefully tested and matched, selected from big batch of identical tubes. All tubes are the same etched code on glass envelope. Long life, special quality, gold pin version, they last forever.