| Four Raytheon 6SN7GTB Tubes Test EX!!! |
| 6SN7GTB – 2 tubes made by Sylvania 6SN7 |
| 6SN7GTB – 2 tubes made by RCA 6SN7 |
| Matched Pair Raytheon Uniline 6SN7 6SN7GTB Tubes NOS? |
| Four 6SN7GTB Audio vacuum tubes (1rca,1g.e.,2 syl.) |
| Matched Pair Westinghouse 6SN7 6SN7GTB Tubes NOS NIB |
| 5 RCA 6SN7GTB / 6SN7 VINTAGE Tubes Lot#19 |
| Four G.E .NOS Jan 6SN7GTB Audio Vacuum Tubes |
| Sleeve (5) 6SN7 6SN7GTB Westinghouse Tubes NOS NIB |
| 8- Tung-Sol 6SN7GTB Tubes |
| NOS MATCHED PAIR G.E. 6SN7GTB TWIN TRIODE AUDIO TUBES |
| Pair GE 6sn7gtb 6sn7 gtb tubes, tested excellent |
| 4 Closely Matched GE, Sylvania 6SN7GTB Tubes Same Code |
| 6SN7 6SN7GTB Tubes NIB NOS |
| 2 RCA 6SN7GTB ~ 6SN7 DUAL TRIODE TUBES~TESTED STRONG! |
| Matched Pair RCA Black Plate 6SN7 6SN7GTB Tubes NOS NIB |
| Pair RCA 6sn7gtb 6sn7 gtb tubes, tested excellent |
| Matched Pair RCA Black Plate 6SN7 6SN7GTB Tubes |
| Matched Pair RCA Radiotron 6SN7 6SN7GTB Tubes |
| Matched Trio Sylvania Chrome Dome 6SN7 6SN7GTB Tubes |
| Matched Quad Sylvania Chrome Dome 6SN7 6SN7GTB Tubes |
| 4 Matched Quad Raytheon 6SN7GTB Tubes 6SN7 Black Plate! |
| Sleeve (5) 6SN7 6SN7GTB Westinghouse Tubes NOS NIB |
| Sylvania 6SN7GTB Chrome Top Tubes- Matched Pair |