The PCF82 is a television frequency changer from the VHF television era. Each section has its own cathode brought out to a pin. The pentode voltage rating is higher than the PCF80. This exhibit is a generic product without a maker being indicated.
The anode is single sided and this is why the beam plate and grid ends can be seen.
The triode on the left is separated from the pentode by an electrostatic screen.
Face view of the small triode. The anode has been formed from a single sheet folded and stitched together to leave a rectangular opening.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 49 mm tall.
References: Datasheet & 1040. Type PCF82 was first introduced in 1953.