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(!!!!!) (Best Overall Pair) EL34 Mullard UK XF1 NOS 1959-1961 double "O-O" getter halos (83ma and 80ma) (1st version after metal base) (very rare)
(!!!!) (Recommended Pair) EL34 Philips by Mullard XF2 double halo "O-O" NOS 1965 and single halo "O" 1969 like new (76ma and 80ma)
(!) (Single) EL34 Mullard XF2 double halo "O-O" used/70% 1962 (62.5ma)
