(!!!!!) (Best Pair 1960's) 12AU7 Mullard UK NOS 1965-1966 same build (10.2/12.4ma and 10.6/12.0ma) (Rogue, Hovland, Audio Note)
(!!) (BEST VALUE) GZ34 Mullard rebranded Sylvania used/like new 1969 (58/40 and 60/40)
(!!) (Recommended Single) 7247=12DW7 Hammond Mullard ribbed plates like new 1966 (1.8ma and 10.6ma)
7591 Fisher Westinghouse used/good/75% 1963 (43.5ma, Gm=7450)
7591 Westinghouse branded RCA NOS 1963 (51.5ma, Gm=9050)
