Pair (2) Vintage Telefunken 12AU7 ECC82 Vacuum Tubes Diamond Embossed Base Smooth Plate Made In Germany.  I put these two together for matched graphics, testing, and construction.  Both tested extremely strong on both sides using Hickok/Western Electric Cardmatic KS-15874-L2. Gm results 72/71 and 76/79 - where 50 is minimum.  Graphics are nice all around.  One has a code of "fi" which is august 1962 - the other is slightly worn away so not sure of exact date but obviously the same era.  Guaranteed as described and to your satisfaction. Shipping in continental USA is $5. I will ship internationally for $23.