(!!!!!) (Recommended Mullard Pair) 6BQ5=EL84 Mullard UK branded RTC England NOS 1971-1978 (45.5ma and 48.0ma)
(!!!!) (BEST MULLARD PAIR) EL84 Philips Mullard UK NOS 1976-1977 (56.2ma and 59ma) (Same Gm)