(!!!) (Best Pair) 6LF6 RCA JAPAN branded Gt. Britain Big Bottle Euro style construction NOS 1973-1975 (115ma and 116ma) 1-2% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1964-1965 (11.4ma and 11.8ma)
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (10.2ma and 10.6ma) 1-5% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (10.8ma and 11.2ma) 1-3% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (11.2ma and 11.6ma) 1-3% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (12.0ma and 12.4ma)
(!!!) (PAIR) EF184 Mullard branded Philips NOS 1964-1965 (8.0ma and 8.2ma) 1-3% matched
(!!!) (Recommended Pair) EF184 Mullard branded Philips NOS 1965 (9.8ma and 10.0ma) 1-2% matched
(!!) (Best Pair) 6LF6 RCA and GE Heerlen Holland Big Bottle NOS 1967-1969 (132ma and 136ma) (Counterpoint OTL, Futterman OTL, Prodigy OTL)
(!!) (Best Value Pair) 6MH6=6LF6 GE NOS 1975-1981 (143ma and 144ma)
(!!) (Recommended Pair) 6LF6 JAPAN Big Bottle Euro style construction NOS 1970's (92ma and 87ma)
(!!) (recommended Pair) 6LF6 RCA JAPAN branded Gt. Britain Big Bottle Euro style construction NOS 1976 (133ma and 141ma)
(!!) (Recommended Pair) 6LF6 Sylvannia NOS same build 1970 era (121ma and 127ma) (Counterpoint OTL, Futterman OTL, Prodigy OTL)
(!!) 6LF6 GE Heerlen Holland Big Bottle NOS 1967 (113ma) (Counterpoint OTL, Futterman OTL, Prodigy OTL)
(!!) EF184 Siemens Germany NOS 1967 (7ma)
(!!) EF184 Siemens Halske branded Zenith Germany NOS 1969 (9.4ma)
(!!) EF184 Siemens rebranded Telefunken NOS 1962 (10ma)
(!!) EF184=6EJ7 Mullard made by Valvo Germany NOS 1963 (7.2ma)
(!!) EF184=6EJ7 Mullard UK in Kradlepack box 1969 (9.7ma)
(!) (Recommended Pair) 6LF6 Sylvania NOS same build (115ma and 121ma) (Counterpoint OTL, Futterman OTL, Prodigy OTL)