1X UPDATED TV7D/U ReTested 1969 GE 6681 12AX7WA E83CC TUBE
Special Ruggedized. 'MZ"6681 12AX7WA' with original. -Glass Etched '12AX7WA' with GE Domino Dots. For Reference (from the GE Engineering Data Sheet for 6681/12AX7WA / E83CC ube dated shown in pics).