(!!!!) (Best pair 1959) 12AT7WA=CV4024 Mullard UK "O" getter NOS 1959 same date codes (9.4/11.8ma and 10.4/11.6ma) (reverb, phase inverter)
(!!!!) (Recommended Mullard Single) 12AT7=ECC81 Mullard UK NOS 1972 (11.6/12.2ma)
(!!!!) (Recommended Pair) ECC81=12AT7 Mullard UK branded Raytheon NOS 1972 (9.2/13.8ma and 9.3/12.5ma) 1-5% matched
(!!!) (Good Value Pair) ECC81=12AT7 IEC Mullard used/good 1967 (6.8/7.0ma and 7.0/7.2ma) (Jolida, Fender)
(!!!) (Recommended Single) 12AT7=ECC81 Mullard branded Raytheon NOS 1972 (11/13.2ma)
(!!!) (Recommended Single) ECC85=6AQ8 Philips Holland NOS 1970's (11.6/14.2ma)
(!!!) (Recommended Single) ECC85=6AQ8 Philips Holland NOS 1970's (13.5/14.4ma)
