Metal Pocket Stereoscopes (various)

nice compilation of five collapsible pocket viewers from around 1910-20, all in very good condition, (1) beautiful viewer for 54x107 slides by Jules Richard, made of brushed aluminium, lever operated focus adjustment, the viewer folds down into a small box, (2) petite folding strut stereoscope for 54x107 slides, made of aluminium, embossed 'Steréoscope LE MARSOUIN', (3) chrome finish viewer for 54x107 slides with rack and pinion focussing and cloth bellows, folds into a box, embossed on the front 'LE PLISTERO', ground glass missing, (4) hand held viewer by T.C. Jack (Edinburgh), made of chrome plated tin, for 6x13 slides and cards, rack and pinion focus and adjustable eye base, (5) small folding viewer made of chrome plated tin. (5)