A pair of mirrors, one convex, on the back of which a flat mirror has been applied, and the other concave, having the same structure, the same dimensions (diameter 16 cm) and the same focal length (17 cm), mounted on a wide wooden frame painted black.
They can revolve around the diametrical horizontal base passing through the suspension pins which are fixed to the ends of a semicircular metal support painted black and are equipped with two brass screws that hold the mirror in the position desired.
The support is attached to the centre of a chrome-plated iron rod which can slide and rotate inside a brass tube held by a heavy cast iron tripod painted black.
The height of the centres of the mirrors can vary from 35 to 54 cm.
Both are in a good state of conservation.