The CV4033 is a special quality double triode with flying leads rather than pins as in the CV4024. The CV4033 is the equivalent of the Mullard M8162 special quality version of the ECC81 VHF double triode. It is useful for RF stages, oscillators and frequency multipliers.
The twin triode sections showing copper grid supports. The actual triodes are considerably smaller than the envelope with the top third taken up by the getter and getter deposit inside the glass.
The triodes seen end on. The top mica is in fact a pair of mica sheets separated by a spacer at the ends.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins, is 48 mm long.