(!!!!) (Recommended Pair) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates used/tests like new 1960's (9.2ma/8.4ma and 9.3/9.4ma)

1 low noise pair) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates used/tests like new 1960's in white boxes

1 tube) 9.2/8.4ma and Gm=2100/2000 (1968)

1 tube) 9.3/9.4ma and Gm=2200/2200 (1960's) faded date code

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