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(!!!!) (Best Pair for the money) 12AX7=ECC83 Telefunken Germany <> bottom ribbed plates used/good 1959 (0.9/1.2ma and 1.0/1.1ma) 1-3% matched
(!!!!) (Best Value Pair #1) 12AX7=ECC83 Telefunken Germany <> bottom branded GAP/R Computor tube <> bottom smooth plates used/good 1964 era (0.9/0.8ma and 1.0/0.8ma)
