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(!!!!!) (Best Single 1971) GZ34 Philips by Mullard Blackburn UK NOS 1971 (58/40 and 58/40)
(!!!!!) (Best Value Pair) GZ34=5AR4 Mullard UK branded RCA NOS 1970 (f32 series) (56-57/40 and 56-58/40)
(!!!!!) (Recommended Single) 5AR4/GZ34 Mullard fat base tests like new 1961 no printing (57/40 and 57/40)
(!!!!) (BEST SINGLE 1970) GZ34 Mullard Blackburn UK NOS branded RCA 1970 (60/40 and 60/40)
(!!!) (Best Value Pair) GZ34 Raytheon Japan by Matsushita NOS similar sound and build to Mullard NOS 1970's (60-60/40 x 2 tubes) 1% matched (LS300, Dynaco, Latino, Scott, Marshall, Fender, Cary)
(!!!) (Best Value Single 1969) GZ34 Mullard UK branded POPE NOS 1969 (58/40 and 60/40)
(!!!) (BEST VALUE) GZ34=5AR4 HH Scott Holland D getters used/strong 1959 (56/40 and 58/40)
(!!!) (READ REVIEW) GZ34 Mullard UK shield logo NOS 1962 (59/40 and 59/40)
(!) (READ REVIEW) GZ34 Mullard UK shield logo NOS 1962
(!) (READ REVIEW) GZ34 Raytheon Japan by Matsushita NOS similar sound and build to Mullard NOS 1970's (59/40 and 59/40 x 2 tubes)
