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(!!!!) (Best Pair #1) EL34 Mullard UK branded Mullartd and Philips NOS XF4 1976-1977 (96.0ma and 94.5ma) (very close Gm matching)
(!!!!) (Best Pair #1) EL34 Mullard UK branded Mullartd and Philips NOS XF4 1976-1979 (99.5ma and 98.2ma) (close Gm matching)
(!!!!) (Best Pair #2) EL34 Mullard UK branded Mullartd and Philips NOS XF4 1976-1977 (92ma and 88ma) (close Gm matching)