The VR65A is an amplifier pentode with external zinc loaded paint metallisation as shielding. The 4.0 V heater was common in the 1930s when mains sets first began to appear.
By the 1960s they were again in limited demand for maintaining ex-Services test equipment (oscilloscopes, etc.) which was then popular in Amateur circles, and in Third-World countries.
The reverse is plain.
Through the top of the valve a distorted image of the grid supports is all that can easily be seen.
The classic envelope is 33 mm in diameter and, excluding the MO base pins, is 83 mm tall.
References: Private communication, data-sheet, 1040 & 1043. Type VR65A was first introduced in 1938. See also1938 adverts.
