Tabel Top Viewer Unis France Educa (various)

set of two wooden Unis France stereo-viewers, (1) well preserved and in perfect working order ‘Educa’ table-top viewer, adjustable focus, this model was sold for educational purposes and is therefore very solid and easy to operate, one special feature is the unique slide format, two rows of 6 stereoscopic images are exposed on a 22.5x18 glass plate, to switch between the two rows the visor is slid horizontally, the viewer comes with 20 of the extremely hard to find glass plates, (2) Unis France ‘Standard’ handheld viewer for 6x13cm slides, adjustable eye base and focus, in good condition. (2)