(!!!!) (Best Value XF2 Pair) EL34 Mullard XF2 NOS (1) double halo "O-O" (1) single halo "O" 1966 and 1970 (75ma and 78ma)
(!!!!) (Recommended XF2 Pair) EL34 Mullard XF2 NOS (1 tube) double halo "O-O" (1 tube) single halo "O" 1967-1968 (90.5ma and 92.8ma)
(!!!!) EL34 Mullard XF2 double halo "O-O" used/good 1963 a few heat stains on plate (72ma)
(!!!) (Best Value XF2) EL34 Mullard branded GE XF2 double halo "O-O" 1966 guide pin broke off (102.5ma)
(!!!) (Recommended Single) 6CA7 GE Big Bottle NOS rebranded GOLD-6CA7 National 1970's (91ma) (Highest Ma) (NOT A PAIR)
(!!!) 6CA7 Sylvania Big Bottle used/good 1970's (72ma)
(Good Value Pair) EL34 Mullard UK XF2 single halo used/good 1969-1972 (83.6ma and 85.6ma)