These Mullard made 6AK5W M8100 EF95 black plate were produced in the UK during the 1970’s-1980’s at the renowned Mitcham factory and are branded either National or RTC (for the french military). They have round halo getters, black plates and are in either red National Boxes, or original French military boxes. Highly recommended for the Little Dot, and ALO Pan Am tube headphone amplifier and USB DAC.
Tight matching available,,,all pieces tested on Amplitrex AT-1000. Enter qty 2 for matched pair.