| 4 VINTAGE TUNG-SOL 6550 TRIPLE O GETTER TUBES ! |
| Dyna 6550 Amplifier Tubes (2) |
| Stromberg AP80 PPP 6550 Tubes Amps, Pair NR! |
| 2 X 6550 TUBES-LESLIE&WESTINGHOUSE-TESTED |
| matched pair TUNG-SOL 6550 TUBES-made in USA-STRONG |
| 2 X 6550 TUBES-LESLIE&WESTINGHOUSE-TESTED |
| 6 MATCHED TUNG SOL 6550 TUBES KT-88 FITS AMPEG SVT VTL |
| MATCHED OCTET NEW TUNG SOL 6550 TUBES TUBE KT-88 BONUS |
| 2 MATCHED TUNG SOL 6550 TUBES TUNGSOL KT-88 TUBE wBONUS |
| NEW mq JJ Electronic KT88 (6550) tubes |
| Quad Vintage Genalex KT88 6550 Tubes Excellent England |
| 16 MATCHED NEW TUNG SOL 6550 TUBES TUBE KT-88 BONUS VTL |
| Raytheon 6550 matched pair NOS 3 getter power tubes |
| matched pair TUNG-SOL 6550 TUBES-made in USA-STRONG |
| Tung-Sol 6550 Power Tubes |
| Stromberg AP80 PPP 6550 Tubes Amps, Pair NR! |
| 3 Closely Matched GE 6550 6550A Tubes Same Codes NOS |
| Two GE 6550 Tubes |
| Pr. RCA 6550 Tubes, Triple Getters, Test High, Tung-Sol |
| Pr. GE 6550 Tubes, Triple Getters, Test High, Tung-Sol |
| SOVTEK 6550 WE POWER TUBES MATCHED SET! HARDLY USED! |
| Matched Quad of TUNG SOL 6550 Tungsol KT88 Power Tubes |
| PAIR OF GENALEX KT-88/6550 VACUUM TUBES |
| PAIR OF TUNG-SOL MADE RCA BRAND 6550 KT-88 VACUUM TUBES |
| 6550 SVETLANA 6550C TUBES NEW PREMIUM MATCHED SETS SVT |
| MATCHED PAIR OF GENALEX KT-88/6550 VACUUM TUBES |
| Tung-Sol 6550 Tubes Matched Quad (4) New Reissue KT88 |