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(!!!) (nice single) USN-6922=E88CC Amperex USA gold pins used/like new 1962 (16/12.8ma)
(!!!) (PAIR) EF184 Mullard branded Philips NOS 1964-1965 (8.0ma and 8.2ma) 1-3% matched
(!!!) (Recommended Pair) ECC85=6AQ8 RCA Heerlen Holland NOS 1968 (21/16.5ma and 18.5/15.5ma) (close Gm)
(!!!) (Recommended Siemens Single) ECC81=12AT7 Siemens branded Mullard NOS circa 1970 (10.0/10.8ma)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!) (Recommended Single) PCC88=7DJ8 Siemens Germany NOS 1972 (11.5/12.2ma)
(!!!) (Siemens Single) 6DJ8 Siemens Halske Germany branded RCA NOS 1967 printed in 1969 (14.2/14.5ma)
(!!!) (Single) E80CC=6085 Philips Holland branded RTC NOS 1975 (5.4ma/5.5ma)
(!!!) (Single) E81CC=12AT7WA Siemens Munich Germany NOS 1975 (10.8/9.3ma)
(!!!) (Single) EC92=6AB4 Siemens Halske Germany branded Mullard 1964 (8.4ma) (mic)
(!!) (Best Overall Single) E88C Siemens Halske Germany NOS 1967 (17.5ma)
(!!) (Best Pair #2) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (7.1/6.3ma and 7.2/6.1ma)
(!!) (Best Pair #3) ECC40 Philips Miniwatt NOS made by La Radiotechnique, Chartres/France 1969 (6.1/5.9ma and 6.5/6.1ma) 1-5% matched
(!!) (Best Pair) E288CC=8223 Siemens Halske Germany rebranded Telefunken NOS 1970 (33.2/33.0ma and 33.3/32.5ma) 1-3% matched
(!!) (Best Pair) ECC40 Philips Import NOS made by La Radiotechnique, Chartres/France 1960 (6.0/6.2ma and 6.1/6.4ma) (Same Gm) 1-2% matched
(!!) (Best Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.5/6.5ma and 6.8/6.7ma) 1-3% matched
(!!) (Best Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.8/6.3ma and 6.8/6.4ma) 1-3% matched
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!) (Best Value Single) 12AT7WA Raytheon black plates - triple mica - O getter halo 1975 era like new (8.5/9.2ma)
(!!) (Best Value Single) 12AT7WA Raytheon NOS black plates - triple mica - O getter halo 1975 era like new (8/12.6ma)
