(!!!) (Recommended Pair) 5881 Sylvania black base NOS 1970's same build (65ma and 67ma)
$ 139.99
1 Matched Pair) 5881 Sylvania black base NOS 1970's same build in white boxes
1 tube) 65ma Gm=6200 (Sylvania branded GE 1973)
1 tube) 67ma Gm=5700 (Sylvania 1970's)
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