(!!!!) (Recommended 6106) 6106 Bendix rebranded 5Y3WGTA Heintz & Kaufman NOS (68/40 and 70/40)

6106 Bendix NOS 1950's rebranded "5Y3WGTA Heintz and Kaufman" in H & K box 1970's double "D" getter halos, glass slightly tilted

1 section) 68/40

1 section) 70/40

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

5Y3GT has a directly heated filament