The EF95/6AK5 is an amplifier pentode that is physically small and the electrode assembly is no more than a 10 mm cube. The use of this device lay in low noise RF amplification at VHF.
The American Type designation 6AK5 was the industry standard name and here Mullard acknowledge this by the use of both the American and Philips-Mullard European Type designations on the glass.
The yellow ink used by Mullard in 1969 was to celebrate the golden anniversary of their founding and is a reflection of the gold zinc paint used in the 1930s.
The large hole in the end wall of the anode reveals all three wire grids and the ever increasing winding pitch.
Anode face view. Copper tape has been used to connect the electrodes to the supports fixed into the base.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 37 mm tall.
References: Data-sheet & 1040. Type 6AK5 was first introduced in 1942. See also1942 adverts.