Pair Sylvania 6189 12AU7WA Gray plates Triple Mica Dual-Stabilizer Hickok Tested
Pair of Sylvania 6189 12au7 WA with Gray plates, Triple Micas and Dual-Stabilizer bars. The Sylvania lettering is worn off both tubes. The etched 6189 is shown on each tube, the 12au7wa label is partially worn off.
