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(!!!!) (Best Pair #1) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.7/10.6ma and 10.6/11.0ma) (closely matched)
(!!!!) (Best Pair #2) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (12.8/11.2ma and 13.8/11.5ma) (closely matched)
(!!!!) (Best Pair #3) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.2/8.8ma and 10.6/9.2ma) (closely matched)
(read review) 12AY7 GE branded RCA gray plates "D" getter NOS 1954 (2.3/2.9ma)
