(!!!!!) (Good Value Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1969 (4.4/4.6ma and 4.5/4.8ma) (1-3% matched)
(!!!!) (Best Value Pair) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (4.4/7.0ma and 4.8/6.0ma)
(!!!) (Best Raytheon Pair) JAN-6021W Raytheon NOS 1972 some extra getter stains on glass (5.0/6.0ma and 4.6/5.4ma)
(SINGLE) 6021 European NOS 1974 (20 in stock)
6021 probably made by EI Yugoslavia NOS 1970's - 1980's (1 pair)
JG-6021 GE black plates NOS 1954 (6.3/6.8ma) (1 single tube)
