Showing the recessed push-button in the knob of the rheostat and also the two nuts on the threaded portion of the rheostat body.

Showing the push-button in the shaft and the recessed face of the hexagon in the knob which must go over the push-button when refitting.

General view of the rheostat showing the two spades for each terminal in a 'U' shape.

Internal view of the rheostat showing multiple printed circuit tracks of varying thickness and length and heat damage at the bottom. The track starts off in the bottom right-hand corner as short thick tracks to give low resistance with high current carrying ability. As the printed circuit (attached to the control knob) is rotated anti-clockwise the tracks get longer to give more resistance and thinner as less current carrying capacity is required. This is shown at near maximum resistance the last segment is not connected to anything to give a 'fully off' position.

View of the rheostat back plate showing another track and the inscription '8 ohms'.

Inside of a fuel gauge case showing the 'duck-egg blue' paint.

Showing the back of the fuel gauge face-plate relative to the case which has the same blue colour on the back of the upper part (carrying the 'SMITHS' and 'FUEL' markings) but matt white on the back of the main part the lower half of which carries the graduations. The bulb is situated at the bottom of the case and so mainly illuminates the white area of the face plate and the inside of the case. Light scatter then has to occur to get through the aperture at the top of the face-plate which then has to scatter still further before it reaches the pointer and graduations.