(!!!) (Best Pair) 12BA6 Sylvania NOS 1960's (10.4ma / 10.6ma) 1-3% matched
12BA6 Brimar BVA England used/good 1960's (9.2ma)
12BA6 CBS used/75% (8.6ma)
12BA6 IEC Mullard UK NOS 1968 (9.2ma)