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(!!!) JHS-6189=12AU7WA Sylvania NOS 1966 in white box (9.5/9.6ma)
(!!!!!) (Recommended Single) JG-6072 GE triple mica black plates "O" getter NOS 1962 (2.9/2.3ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE)
(!!!!!) (Best Single) E81CC=6201=12AT7 Philips Mullard UK SQ NOS gold pins 1974 (11.5/10.8ma) 1-5% section balance
6463 GE NOS 1965 (12.0/12.6ma)
(!!!) (Best Single) EC86 Amperex Bugle Boy Germany by Valvo 1959 (12.6ma)
(!!!!) (Best Sylvania Pair) JHS-12AT7WA Sylvania triple mica "D" getter NOS 1959-1960 (10.8/12.8ma and 11.6/10.8ma) (phase inverter, reverb)