(!!!!) (Recommended Pair) 5881 GE Canada NOS 1965-1967 (78ma and 81ma) (Identical to Tungsol)
(!!) (Good Value) 6SN7GT GE JAN Canada NOS around 1950 (8/10.2ma)
(!!) (Recommended Pair) 0B3 Sylvania NOS 1940's (argon)
(!!) (Recommended Single) 5881 GE Canada NOS 1966 (65.2ma) (same build as Tungsol)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (73ma) (same build as Tungsol)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (81ma) (same build as Tungsol)
