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(!!!!) (Best Value Pair) 5881 GE Canada NOS 1965-1970 (73ma) (same internal build and sonics as 5881 Tungsol)
(!!!) (Best Single) 6SN7GTB RCA branded GE Canada NOS 1968 (7.0/7.0ma) 1% section balance
(!!) (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) JAN-CLRV-6SN7WGTA GE Canada brown base NOS 1970 (7.8/6.4ma)
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)