(2) MATCHED Sylvania 6SN7 GT. Up for sale is an ULTRA RARE MATCHED PAIR of Sylvania black plate 6SN7 GT tubes. Black “T” plates. Manufactured in 1953! Also known as a VT-231 tube type. 3-Hole Black T Plate Tubes.
Item Tag: Sylvania 6SN7GT
(2) Sylvania 6SN7GT Chrome Dome 3 Hole Black Plate Matched Codes 1953 Strong
Tube 1 Emissions 82% & 90% | GM 107% & 107%. Tube 2 Emissions 81% & 81% | GM 100% & 103%.