The PC88 is a UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners. Mullard describe the PC88 as: a UHF frame-grid grounded grid amplifier triode. This exhibit was made by Philips and carries the Made in Holland wording.
The anode is an open ended rectangle with the flat end facing the grid. Here the open end is seen.
The anode on the right is close to the frame grid in the centre. The frame grid winding is of very fine wire held under tension.
The cathode and grid wires seen from the rear.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 42 mm tall.
References: Datasheet & 1040. Type PC88 was first introduced in 1962.