R4 and N4, 1944 date codes. AVO NOS Specs: IA = 9.0 GM = 2.9. No leaks or shorts / gas, solid bases, shiny pins. Don't use your amp as a circuit breaker, buy tested valves! A2 8.5 2.5.
Matched Pair Brimar Foreign 6SN7GT CV1988 Valves Tubes New Old Stock
2 KENRAD 6SN7GT VT231 Tubes / Amplitrex Tested / Staggered Plates / Clear Glass
NOS MATCHED PAIR GE 5670W 396A Black Plate Code Matched Vacuum Tubes
M8100 6AK5 CV4102 MULLARD SPECIAL GOLD PIN MATCHED PAIR VALVE/TUBE
6V6GT ORIGINAL MARSHALL SPARES VALVE TUBE MATCHED PAIR (2PCS)
Matched Pair GE USA JAN 5654W 6AK5 EF95 White Print Halo Getter Valves
