| 2 NEW BOXED SYLVANIA 6X4WA BLACK PLATE TUBES VALVES |
| A373 (4) CBS BLACK PLATE 6C4 TUBES NOS |
| (2) 5687WB Philips NOS black plate vacuum tubes - NR |
| A374 (4) SYLVANIA BLACK PLATE JHS 6C4 TUBES NOS |
| Pair Vintage Raytheon Black Plate 6SN7 GTB Preamp Tubes |
| (5) Vintage RCA 12AV7 Black Plate Jukebox Tubes TESTED! |
| 2 VINTAGE BLACK PLATE 6L6GB 6L6 GB TUBES !! |
| 4 1960 BLACK PLATE 12AX7 TUBES |
| 6 misc. black plate 12au7 12au7a tubes |
| 10 Matching GE Black Plate 5687 Tubes 7119/7044 |
| 5687 MATCHED PAIR BLACK PLATE TUBES FOR AUDIO NOTE NOS |
| 2 Westinghouse Black Plate 12AU7A ECC82 Vacuum Tubes |
| 10 NOS Raytheon 1958 Black- Plate 12AX7 Audio Tubes |
| 10 Matching Tung Sol Black Plate 5687 Tubes ! ! ! |
| Identical Pair of CBS 6SN7 GTB Black Plate Tubes |
| Matched Pair CBS Hytron Black Plate 6SN7 6SN7GT Tubes |
| 2 NEW SYLVANIA TRIPLE MICA BLACK PLATE 5751 12AX7 TUBES |
| 2 Vintage RCA 6SN7 Black Plate Stereo Tubes |
| 2 RAYTHEON TRIPLE MICA BLACK PLATE 5751 12AX7 TUBES |
| Pair Vintage Raytheon Black Plate 6SN7 GTB Preamp Tubes |
| 6 Black Plate Raytheon JAN CRP 5687 Tubes ! ! ! |
| pair sylvania black plate 12au7 12au7a tubes |
| Lot of 4 NOS 5687 black plate tubes National |
| 2 12AT7 black plate vacuum tubes test very strong |
| 2 Matching RCA Black Plate 12AX7 Tubes ! TESTED ! ! ! |
| PAIR NOS SYLVANIA 6V6GTA BLACK PLATE VACUUM TUBES NR |
| 3 RAYTHEON 12AX7A BLACK PLATE VACUUM TUBES |
| 2 NOS 5X4G 'Big Bottle' Black Plate Rectifier tubes |
| TWO USED GE 5814WA BLACK PLATE TUBES TESTING VERY GOOD |
| 4 Triple Mica Black Plate GE 5751 Tubes ! ! ! |
| Matched Pair Black Plate GE 3 Mica 5 Star 6201 Tubes |
| Pair, RCA Black Plate 6L6GC Audio Amplifier Tubes |
| PAIR MATCHED NEW OLD STOCK RCA BLACK PLATE 6L6GC TUBES |
| Matched Pair RCA Black Plate 6SN7 6SN7GTB Tubes NOS NIB |
| Matched Pair 12AU7 Black Plate Tubes Early Production! |
| 2 NEW IN BOX 1960 RCA BLACK PLATE 6X4 RECTIFIER TUBES |
| Matched Pair RCA Black Plate 6SN7 6SN7GTB Tubes |
| 2 Gold Sylvania Triple Mica Black Plate 5751 Tubes ! ! |
| RCA Black Plate 6189 12AU7 ECC82 Tubes- Matched Pair |
| RCA 6L6GC (6L6/5881) Black Plate amplifier tubes (pair) |
| RCA Black Plate 5963 12AU7 ECC82 Tubes- Matched Pair |