(!!) 12BH7A Westinghouse black plates "U" getter used/good 1950's (6.2/7.2ma)

1 low noise tube) 12BH7A Westinghouse black plates "U" getter used/good 1950's - faded printing in white box

1 section) 6.2ma Gm=2100

1 section) 7.2ma Gm=2300

Tested on Amplitrex

- Octave M90 mono amps (http://tubeworldexpress.shop/)
- Quicksilver Audio V4 mono amp
- Quicksilver Triode amp
- Thor
- Doshi Alaap preamp
- Art Audio Diavolo
- Vexo S40 amp
- Art Audio Carissa Signature amp
- Art Audio PX25 amp
- Universal Audio LA2A