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Tungsol 6550


3 strong tungsol solid black plate 6550 tubes

$189.99


2 Tung-Sol 6550 KT-88 Tubes Test Good

$21.50


2 Very strong tungsol solid black plate 6550 tubes

$179.99


1 NOS Tung-Sol 6550 Black Plate Audio Tube USA 1958

$195.00


Matched Pair 6550 Tung Sol GE Power Pentodes - Same Batch - Test NOS+ On 539C!

$99.99


Pair Vintage Tung Sol Leslie 6550 tubes Leslie Matching numbers

$19.99


2 NOS RCA/TUNG-SOL 6550/KT88 AUDIO/VACUUM TUBES GRAY PLATE 3 GETTER TESTED

$225.00


Brand New Matched Quad (4) TUNG SOL 6550 Vacuum Tubes

$129.00


6550 Tungsol tube pair

$199.99


4 Vintage Tung-Sol 6550 Black Plate Vacuum Tubes Amplitrex At-1000 Tested

$549.95


1 excellent very strong 1966 tungsol 3 hole 6550 tube # 19052

$69.99


Factory Platinum Matched Quad Tung Sol 6550 tubes, Brand New in Box !

$135.37


New Plate Current Matched Quad (4) Tung-Sol Reissue 6550 KT88 Coke Bottle Tubes

$169.19


2 RCA/TUNG-SOL 6550/KT88 AUDIO/VACUUM TUBES GRAY PLATE 3 GETTER MATCH TESTED

$180.00


early vintage '50s pair Tung-Sol 6550 Power Tubes smooth plates

$200.00


4 VINTAGE TUNG-SOL 6550 from early to mid 60s. Amplitrex AT-1000 tested

$280.00


Vacuum Tube, 6550, Tung-Sol Reissue, Apex Matched Quad, Power

$145.80


Sextet of Tung-Sol 6550 NOS NIB 1960s Vacuum Tubes

$1,200.00


1 x 6550 Tungsol(USA) Tube *Solid Black Plate*

$128.99


4 VINTAGE TUNG-SOL 6550 3-hole variant. Amplitrex AT-1000 tested

$280.00


Factory Matched QUAD Tung-Sol Tungsol 6550 KT88 - For Tube Amplifiers

$155.00


Matched Pair of Tung-Sol (Sylvania label) 6550 NOS NIB Vacuum Tubes

$400.00


Vacuum Tube, 6550, Tung-Sol Reissue, Apex Matched Sextet, Power

$218.70


4 x Tung sol 6550/KT88 early black plate, dual side D getter. matched quad # 1

$900.00


Tung-Sol 6550 Gray Plate - Quad - Measure NOS

$575.00


Factory Matched Octet Tung-Sol Tungsol 6550 KT88 - Audio Research Tube Amplifier

$320.00


Quad of Tung-Sol 6550 New Production Power Vacuum Tube

$139.92


2 x Tung sol 6550/KT88 black plate, dual side D getter. strong & matched pair #3

$450.00


A VINTAGE TUNG SOL BRANDED RCA 6550 NOS/NIB VACUUM TUBE

$225.00


Tung-Sol Set of Three 1963 6550 Vacuum Tubes 92% 93% 88% Solid Gray Plates

$280.00


3x Tung-Sol 6550 Power Tubes • Leslie • 1967 70 Powr Match • Light Use • Tested

$299.00


Tung-Sol 6550 ST NOS-U.S. Made

$349.95


Factory Matched OCTET Tung-Sol Tungsol 6550 KT88 - For Tube Amplifiers

$320.00


TUNG-SOL 6550 POWER TUBES FOR SYLVANIA NOS/NIB-ORIGINAL BOX SWEET AS WELL-TOP NO

$600.00


Vintage Tung Sol 6550 Single Side D Getter

$150.00


Tung-Sol 6550 Power Tubes • Leslie • 1968 Powr Match • Light Use • Test Exc

$240.00


TUNGSOL 6550 Single SOLID SMOOTH Black PLATE US MADE

$227.47


2 Tung-Sol for GE 6550 3 Hole Grey Plate 6550 Audio Tubes USA Coke Bottle 70's.

$300.00


Tung Sol 6550 KT88 Solid Black Plates Vacuum Tube Very Strong (3) Available

$173.99


Qty 4, Vintage Tung-Sol 6550, Matched Pairs, Solid Plate, Triple Getter, Tested

$449.00


Nos Matched Pair Tung-Sol 6550 Black Plate Vacuum Tubes 78/74 Min 44 W/box

$449.00


Qty 4, Vintage Tung-Sol 6550, Solid Plate, Triple Getter, Tested Very High Ampli

$449.00


TUNGSOL 6550 Single SOLID SMOOTH Black PLATE US MADE #2

$87.47


Pr Vintage Tung-Sol 6550, 1962 & 63, Solid Plate, Triple Getter, Tested Amplitre

$289.00


TUNG-SOL single JAN-6550 triple getter power tube NOS NIB 1967 loc D1-1

$325.00