Looking at the two altimeters the top one is in inches and has the altitude warning segment on it. This is the white sector in the six o'clock that starts to appear at about 16,000 ft.. Pilots had misread the third, 10k needle and had speared in thinking they had 10,000 ft. to go.
The lower altimeter is in millibars yet has a blank face which I find surprising as all RAF Vampires had a segment in 1962.