This exhibit, the GZ32, is a medium power full wave rectifier for general purpose use. It probably would have been used in audio power amplifiers or modest radio transmitters.
The maximum reservoir capacitor was 60 µF and the minimum series resistance to limit current was 150 Ohms.
Face view of one anode. The majority of the width is just a radiator with the working cylinder in the centre.
The round cathode tube with insulated heater.
The classic envelope is 44 mm in diameter and, excluding the IO base pins, is 102 mm tall.
References: Data-sheet & 1040. Type GZ32 was first introduced in 1946. See also1946 adverts.