(!!!!) (BEST PAIR #1) ECC808=6KX8 Telefunken Diamond Bottom NOS 1969 (1.2/1.2ma and 1.3/1.4ma)
(!!!) (BEST PAIR #2) ECC808=6KX8 Telefunken Diamond Bottom NOS 1969 (1.1/1.1ma and 1.1/1.4ma)
(!!) (Best Single) ECC808=6KX8 Mullard Made in Germany by VALVO NOS 1969 (2.1/2.2ma)
ECC808=6KX8 Mullard Made in Germany by VALVO NOS 1969 same date codes 1-2% matched (matched on Amplitrex)
