The PCF802 was designed as the first stages in television line frequency generation prior to the line output stage. The pentode is described as the oscillator while the triode is for service as a reactance valve. This suggests the triode acting as a frequency controlling stage.
This unbranded valve dates to when an imported product was labelled as Foreign.
The triode with the electrostatic screen separating it from the larger pentode.
The screen extends beyond the width of the active sections.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Data-sheet, 3002 & 1040. Type PCF802 was first introduced in 1962.