1 low noise pair) 6922=E88CC Telefunken Germany <> bottom NOS 1960 same date codes very good printing

1 tube) 15.4/16.4ma Gm=12700 and 12800 

1 tube) 14.0/17.6ma Gm=12300 and 13200 

Matched on Amplitrex AT1000

Vplate=90V

Vgrid=-1.2V

Good Iplate range 12-15ma

Good Gm range 11,000-12,500

Recommended for

Audio Research

Zanden

Air Tight

Klimo

Earmax

BAT

Cary

Musical Fidelity

Pathos

Lamm

Avalon