(!!!!!) (2nd Best Pair 1959) 5AR4/GZ34 Fisher Mullard UK Fat Base NOS 1959 (f31 series) (57-57/40 and 57-57/40) 1-2% section balance (2nd best GZ34 to metal base)
(!!!!!) (Best GZ34) GZ34 Mullard UK shield logo fat base 1959 (58/40 and 59/40) (f31 series)
(!!!!!) (Best Pair 1959) 5AR4/GZ34 Fisher Mullard UK Fat Base NOS 1959 (f31 series) (57-58/40 and 57-58/40) 1-2% section balance (2nd best GZ34 to metal base)
(!!!!!) (Best Single) EL34 Mullard UK XF1 NOS 1959 double "O-O" getter halos (83ma) (1st version after metal base) (very rare)
