The FU-32 is a Chinese implementation of the 1950's 832A double beam tetrode. The original valve was made for power amplifier use in VHF transmitters and both the Russians and Chinese made copies for their own use that can be considered sensibly equivalent to the American original. The design was also rated for Class B audio modulator service.
It has been suggested by Martin Bariny that the date code on this exhibit is for August 1959. If this is the case, then the kit it came with is using new old stock Chinese military valves - quite possible.
These days this type of valve, based on the 6V6 design, is used for quality audio purposes and most often found in Class A applications. The 6V6GT used in Class A1 has an anode dissipation of 12 Watts whereas each half of the 832A et al has a maximum dissipation of 7.5 Watts.
The European pattern VHF double tetrodes replaced the 832A design when valve mobile transmitters were still in use. SeeQQV03-20A. Although visibly pleasing the 832A perform better in audio applications.
Chinese data-sheets exist but the 832A that it was based on is a good guide.
The oval anode with the bright beam plate visible top and bottom.
A closer view: the cathode tube has flat sides and rounded ends.
Above the beam plate and fixed to it is the top screen. The cathode shape is clear to see.
The lower mica: the insulated heater wires can be seen entering the base of the cathode.
The wide glass tube envelope is 51 mm in diameter, and excluding the B7A base pins is 74 mm tall.