Swan’s Stereoscope 'The Clairvoyant'

extremely hard to find viewer by the stereo-pioneer Henry Swan of London, the wooden bed of the viewer is in two parts separated by two prongs which fit into holes lined with cloth to provide proper sliding friction, the viewer is held by the round knob on the underside with the thumb in the hole, the usual central divider is eliminated in favour of a ribbed glass central section, the hinged rear lid enables to choose between slides and cards, the left square cut lens has been replaced, otherwise in good condition. One of the classic collectible viewers!