Folding stereoscope in a mahogany wooden box
Folding stereoscopic viewer for 9x18 stereograms that passes through a side slot
Mahogany construction around 1885.
This viewer has hinged sides that fold into the case for transport, reducing bulk.
On one of the flaps are inscriptions, initials MH? and patented SGDG
Rare viewer model of good quality
closed box size 18.5 cm x 10.5 cm x 4 cm (7.29" x 4.14" x 1.58") thick
Good condition