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(!!!!) (Best Pair #2) 5881 Tungsol used/strong 1951 (67ma and 71ma) (1st series made)
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1960-1962 (7.0/6.8ma and 7.2/6.8ma) (smooth) (Schiit Freya, Rogue)
(!!) (Recommended Single) 5881 GE Canada NOS 1977 (75.5ma) (same build as Tungsol)
(!!) (Single) 6SN7GTB GE branded Raytheon NOS 1970's (10/9.6ma)
(!!) (Single) 6SN7GTB Raytheon black plates NOS 1960 era (6.2/7.6ma)
(!!) (Single) 6SN7GTB Raytheon black plates short bottle NOS 1950's (8/7ma) (High Gm)
6L6GC GE tests like new 1964 broken center guide pin (87.5ma)
6L6GC GE Zenith low hours/like new 1960's in white box (61.5ma)
