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(!!!!) (Best Pair #3) 6EU7 RCA NOS 1967 (48-49/32 and 51-52/32)
(!!!!) (Best Pair #4) 6AC7 GE NOS 1979-1982 (8ma/7.8ma)
(!!!!) (Best Pair 1960) 12AX7 GE tall gray ribbed plates "U" getter like new 1960 (1.2/1.2ma and 1.3/1.2ma) 1-3% matched
(!!!!) (Best Pair 1963) 5U4GB GE NOS 1963 same date codes (60-62/40 and 60-60/40 x 2 tubes)
(!!!!) (Best Pair 1966) CV378=GZ37 Mullard NOS 1966 (52-52/40 x 2 tubes) 1% matched
(!!!!) (Best Pair 1971) 12AX7 Philips Holland NOS 1971 (1.2/1.2ma and 1.2/1.3ma) 1-3% matched
(!!!!) (Best Pair for the money) 5Y3GT Philips Holland NOS 1960's (60-66/40 and 60-66/40)
(!!!!) (Best Pair) 12SN7GTA GE coin-base side getter NOS 1980 (10.4/10.8ma and 10.4/10.0ma) (same Gm)
(!!!!) (Best Pair) 12SN7GTA GE coin-base side getter NOS 1980 (11.4/10.6ma and 10.8/10.6ma) 1-3% matched (Highest Ma and Gm)
(!!!!) (Best Pair) 12SN7GTA GE coin-base side getter NOS 1980 (8.8/9.4ma and 8.4/9.0ma) (close Gm)
(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)
(!!!!) (BEST PAIR) 5U4GB Raytheon NOS "O" getters 1962 (58-59/40 and 59-60/40)
(!!!!) (Best Pair) 5Y3GT Philips Holland NOS 1960's (60-64/40 and 60-65/40)
(!!!!) (Best Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49/40 and 50/40 x 2 tubes) 1% matched
(!!!!) (BEST PAIR) 6EU7 Tungsol Dumont "D" getter NOS 1963 (50-51/32 and 49-52/32) 1-3% matched
(!!!!) (Best Pair) 6L6GC GE NOS and like new 1980 (68.7ma and 69.0ma)
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1950 (1.0ma and 1.0ma) 1-2% matched **
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1950-1953 (1.0ma and 1.0ma) 1% matched **
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1953 (1.0ma and 1.0ma) 1% matched **
(!!!!) (Best Pair) 8D8=EF86 Brimar UK quad mica NOS 1961 (2.9ma and 3.0ma) 1-2% matched
