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LOT OF 9 12BA6 HF93 International Service Master Tubes *FREE SHIP* (NOS)
Buy: $79.99
Pair International Compactron 6CL3 Vacuum Tubes NOS
Buy: $35.00
Vintage International Servicemaster 38HK7 Electron Tube
Buy: $50.00
International Servicemaster Tube 6C6 LOT of 2 NEW
Buy: $23.40
TESTED VINTAGE INTERNATIONAL SERVICEMASTER 12AX7A TUBE GREY PLATE HALO GETTER
Buy: $24.95
2 International Servicemaster 6KM6 Tubes Dual Halo Get Copper Posts NOS/NIB
Buy: $29.95
International Servicemaster Vacuum Tube / 6AK8 - EABC80 / CS1
Buy: $9.95
International Servicemaster 4EW6 Vacuum Tube Nos Nib Gold Pins TESTED
Buy: $9.95
5 International Servicemaster 12AV6 Tubes NOS/NIB Free Shipping
Buy: $27.95
SERVICEMASTER 6AV6 EABC91 Tube NOS NIB Strong Triode & Good Diodes AMPLITREX
Buy: $10.95
INTERNATIONAL SERVICEMASTER Electron Tube 30AE3/PY88, NEW (O HB)
Buy: $12.99
2 - International Servicemaster Vacuum Tubes / 5751 / CS1
Buy: $49.95
6 - International Servicemaster Vacuum Tubes / 6EA8 / CS1
Buy: $34.95
2 NOS International 6AL5 / EB91 vacuum tube - New old stock
Buy: $14.49
LOT OF 5 6GS7 VACUUM TUBES - NOS/NIB
Buy: $19.99
12AE6A Double Detector Diode Triode Radio Audio Vacuum Tube
Buy: $23.90
INTERNATIONAL SERVICEMASTER Electron Tube 25C5, NEW (O HB)
Buy: $12.99
INTERNATIONAL SERVICEMASTER Electronic Tube 6LX8 LCF802, NEW (O IB)
Buy: $13.99
INTERNATIONAL SERVICE MASTER Radio Tube 6DN3, NEW (O HB)
Buy: $13.99
4 - International Servicemaster Magic Eye Tubes / 6GX8 EAM86 / CS1
Buy: $39.95
INTERNATIONAL SERVICEMASTER Electron Tube 25CG3, NEW (O HB)
Buy: $13.99
6AU6A EF94 INTERNATIONAL SERVICEMASTER Tube Untested *QUICK SHIP*
Buy: $10.80
International Servicemaster Vacuum Tube / 6DL4 EC88 / CS1
Buy: $12.95
International Servicemaster Vacuum Tube / 6EU7 / CS3
Buy: $24.95
NOS International 6AQ5A / 6HG5 / EL90 Vacuum Tube
Buy: $14.99
3 - International Servicemaster Vacuum Tubes / 6GH8A / CS1
Buy: $19.95
4X International Servicemaster Vacuum Tubes / 12AU6 HF94 / CS1
Buy: $19.95
General Electric Radio Tube 6CM7, NEW (O HB)
Buy: $13.99
6LQ8 NOS vacuum tube triode pentode
Buy: $28.00
12SQ7MG INTERNATIONAL SERVICEMASTER Tube Untested *QUICK SHIP*
Buy: $42.08
1 X 5AF4A TUBE Nos International Service Master
Buy: $14.00
Vacuum Electron Tube 6AU6A EF94 International C Servicemaster Vacuum Tube E4
Buy: $13.49
International Service Master - 6BA8A - Vacuum Tube - NOS - Tests Good
Buy: $7.00
5X International Servicemaster by GE Vacuum Tubes / 12AU6 HF94 / CS1
Buy: $24.95
INTERNATIONAL SERVICEMASTER Electron Tube 2JGY5, NEW (O HB)
Buy: $19.99
INTERNATIONAL SERVICEMASTER Electron Tube 38HE7, NEW (O HB)
Buy: $19.99
NOS International Servicemaster 6GV8 / ECL85 Vacuum tube
Buy: $14.99
NOS International Servicemaster 6DT6A Vacuum Tube
Buy: $7.19
LOT OF 8 INTERNATIONAL VACUUM TUBE NOS BOX GUITAR AMP HAM RADIO TV PART VTG
Buy: $49.99
NEW INTERNATIONAL SERVICEMASTER ELECTRON TUBE 49 922-56 USA NOS
Buy: $34.27
International Service Master Vacuum Tube / 6ER5 EC95 / KT1
Buy: $9.95
International Servicemaster NOS 6BQ5/EL84 Vacuum Tube Tested
Buy: $35.00
NOS International Servicemaster 6HF8 Vacuum tube
Buy: $10.99
(2) International Servicemaster/Unbranded NOS 33GY7 Vacuum Tubes Tested
Buy: $10.00
IEC 12AX4GTB Half-Wave Rectifier Damping Diode Tube NOS NIB Tested Free Shipping
Buy: $12.00
NOS International Servicemaster 6DW5 Vacuum tube
Buy: $12.99
3 - International Servicemaster Vacuum Tubes / 6CS6 EH90 / CS1
Buy: $12.95
One SERVICEMASTER 12BY7A Tube NOS NIB GM[%]: 96, EM[%]: 91: AMPLITREX
Buy: $14.95
International Servicemaster NOS 12CU5/12C5 Vacuum Tube Tested
Buy: $10.00
2 - International Servicemaster 6CW7 ECC84 Vacuum Tubes / CS1
Buy: $19.95
International Servicemaster Vacuum Tube / 12AU7A ECC82 / CS3
Buy: $19.95
6LU8 TUBE INTERNATIONAL NIB TESTED & BOXED VINTAGE COMMERCIAL SURPLUS
Buy: $11.69
Matched Pair of International Servicemaster - GE Vacuum Tubes / KT88 / CS2
Buy: $179.95
NOS International Service Master (Mullard) 7KY6 Vacuum Tube
Buy: $7.59
4X International Servicemaster Tubes / 6KE8 / CS1
Buy: $19.95
6CM5/ EL36 TUBE INTERNATIONAL SERVICEMASTER TESTED & BOXED COMMERCIAL SURPLUS
Buy: $9.99
NOS International Service Master 11HM7 Vacuum tube
Buy: $7.59
International Servicemaster NOS 6GH8A Vacuum Tube Tested
Buy: $15.00
25CG3 TUBE INTERNATIONAL NIB TESTED & BOXED VINTAGE COMMERCIAL SURPLUS
Buy: $7.89
6B8 Vintage Soviet Double Diode+Pentode Detector Tube Valve NOS
Buy: $9.00
IEC International NOS 6C4/EC90 Vacuum Tube Tested
Buy: $12.00
NOS International Servicemaster 6GM6 Vacuum Tube
Buy: $8.99
International Servicemaster NOS 6CG7/6FQ7 Vacuum Tube Tested
Buy: $22.00
Vintage International 6AV6 Grey Plate Top Getter Made in USA Tested Good
Buy: $11.99
6LH6A/6LJ6A TUBE INTERNATIONAL SERVICEMASTER NIB TESTED & BOXED VINTAGE SURPLUS
Buy: $9.99
International C Servicemaster Electron Tube 6EB8 / 6GN8 Vacuum Tube
Buy: $12.00
(5) NOS 6HZ6 Pentode Tubes by International Servicemaster (Japan) Clean! GOOD!
Buy: $14.99
International Servicemaster Vacuum Tube / 6GU7 Japan KT1
Buy: $9.99
2 IEC International Servicemaster Vacuum Tubes / 6KV8 -- RM1
Buy: $14.95
Radio Tubes 6AL5 6663 International Servicemaster USA NOS No Test Quantity 10
Buy: $44.99
Radio Tubes 6AL5 6663 International Servicemaster USA NOS No Test Quantity 4
Buy: $24.99
International Servicemaster NOS 6DQ6B / 6GW6 Vacuum Tube Tested
Buy: $15.00
I.C.S 6LE8 N.O.S Twin Pentode Color Demodulator TV Audio Vacuum Tube Valve
Buy: $19.99
10GF7A TUBE INTERNATIONAL SERVICEMASTER - UNTESTED - NOS VINTAGE TUBE NIB JAPAN
Buy: $13.99
23Z9 TUBE INTERNATIONAL SERVICEMASTER NIB TESTED & BOXED COMMERCIAL SURPLUS
Buy: $8.59
International C Servicemaster Electron Tube 12AT6/ HBC90 Vacuum Tube
Buy: $16.00
Radio Tubes 31JS6C 31JS6 International Servicemaster NOS
Buy: $24.99
International Servicemaster 6BK4C / 6EL4A Vacuum Tube Tested
Buy: $10.00
International Servicemaster - GE Vacuum Tube / 6EU7 / CS1
Buy: $24.95
6HJ7 TUBE INTERNATIONAL SERVICEMASTER TESTED & BOXED COMMERCIAL SURPLUS
Buy: $9.99
6X International Servicemaster Tubes / 6U8A ECF82 / CS1
Buy: $39.95
International C Servicemaster Electron Tube 6U10 Vacuum Tube
Buy: $12.00
17BS3 A TUBE INTERNATIONAL NIB TESTED & BOXED VINTAGE COMMERCIAL SURPLUS
Buy: $9.69
6KE8 TUBE SERVICE MASTER NIB TESTED & BOXED VINTAGE COMMERCIAL SURPLUS
Buy: $8.59
5 International Servicemaster Vacuum Tubes / 6BN4A / CS1
Buy: $29.95
International 9EA8 Vacuum Vacuum Tube NOS NIB Tested
Buy: $7.00
International C Servicemaster Electron Tube 3HA5 / 3HM5 Vacuum Tube
Buy: $12.00
Int'l Servicemaster 2AV2 Half-Wave Rectifier Tube NOS NIB Tested Free Shipping
Buy: $7.00
International C Servicemaster Electron Tube 12SK7 Vacum Tube
Buy: $15.95
International C Servicemaster Electron Tube 12AV6 / HBC91 Vacuum Tube
Buy: $14.00
6GM6 NOS vacuum tube International Servicemaster
Buy: $9.99
NOS International Type 38 Vacuum tube. Engraved base.
Buy: $16.99
Servicemaster 6GM6 Sharp Cutoff Pentode Tube NOS NIB Tested Free Shipping
Buy: $8.00
International Servicemaster 6GF7A  Dual Triode Tube NOS NIB Tested Free Shipping
Buy: $8.40
Service Master 6HZ6 Sharp Cutoff Pentode Tube NOS NIB Tested Free Shipping
Buy: $8.00
6HS5 TUBE INTERNATIONAL SERVICEMASTER TESTED & BOXED VINTAGE COMMERCIAL SURPLUS
Buy: $8.99
NOS/NIB Sleeve 5 International ServiceMaster 6KA8 Tubes Copper Posts Free Ship
Buy: $29.95
5X (1 Sleeve) International Servicemaster Tubes / 6AB8 ECL80 / Japan / CS1
Buy: $29.95
International Service Master Vacuum Tube / 85A2 0G3 / 922-181 -- KT
Buy: $9.95
International C Servicemaster Electron Tube 6HJ7 Vacuum Tube
Buy: $12.00