Russian and Japanese Viewers

lot of five rare handheld viewers made in Russia and Japan, (1) 'Minori' Viewer produced by Rokuwa Co. Ltd. (Japan) around 1960, the collapsible metal stereoscope with green enamel faux-hammer finish is in mint condition, the original makers box is intact, but edges are torn, the viewer comes together with one stereo slide of Tokyo Central Station, (2) basic black painted metal viewer made by Ukidashi Shashin Gankyo (Japan) in used condition, the highlight of this viewer is the colourful illustrated box showing a boy looking at Mount Fuji through a stereoscope, comes with five matching stereo images, (3) Russian two-tone plastic viewer with adjustable focus labelled 'Steroscope-3' in near mint condition, (4) collapsible boxed cardboard viewer labelled 'Stereoscope Tshaika' in mint condition, produced around 1975, comes with sixteen views of the Polytechnic Museum in Moscow, the colour slides are faded, (5) boxed black Bakelite viewer for cardboard reels, minor chipping on top of the body, otherwise in very good condition, comes with five reels showing sights of Leningrad, colour slides faded. (5)