(!!!!!) (Best Mullard 1961) 5AR4/GZ34 Mullard fat base used/very good 1961 (f31 series) (59/40 and 60/40)
(!!!!!) (Best Single 1963) GZ34 Mullard Hewlett Packard UK low hours/like new (60/40 and 60/40) 1% section balance
(!!!!!) (Recommended Single) GZ34 EICO Mullard UK low hours/like new 1962-1967 era (58/40 and 59/40)
(!!!!) (Best GZ34 single 1957) GZ34 Mullard Holland metal base NOS 1957 in white box (57/40 and 58/40)
(!!!!) (Best Holland GZ34) GZ34 ADZAM Holland NOS double "D" getter halos 1960 (60/40 and 60/40) (similar sound to metal base from
