(!!!!) (Recommended Pair) 6106 Bendix NOS 1950's rebranded 5Y3WGTA Heintz & Kaufman partially faded printing (66-69/40 x 2 tubes)

1 matched pair) 6106 Bendix NOS 1950's rebranded "5Y3WGTA Heintz and Kaufman" in H & K boxes 1970's double "D" getter halos - partially faded printing on both tubes

1 tube) 66/40 and 69/40

1 tube) 66/40 and 69/40 slightly tilted glass

6106 is a indirectly heated (slow warmup) sub for a 5Y3GT

5Y3GT has a directly heated filament