(!!) (Best Value Single) E88CC=6922 Siemens Halske Germany "O" getter halo used/very good 1963 (11.5/12.6ma) (mic grade)1 low noise tube) E88CC=6922 Siemens Halske Germany "O" getter halo used very good 1963 good printing in white box 1 section) 11. 6ma Gm=10,500 1 section) 12. 8ma Gm=11,500 (very open, airy, transparent, detailed) recommended for: Aesthetix Io phono stage CAT SL 1 Audible Illusions Audio Research ARC PH 5 phono Herron VTSP 2 preamp EAR Herron 6 Kora Hermes II Tube DAC Decco Integrated amp Lector Manley Steelhead Ear Acute