Ica Dresden 'Stereospekt' (various)

set of four wooden viewers, (1) the rare Ica Dresden 'Stereospekt' table-top viewer, it appears that the viewer has been re-finished and therefore the golden Ica logo on the front is missing, otherwise in good condition, compact multiple viewer adapted for sets of 12 glass slides mounted in fan-fold fashion in die-stamped metal frames, a lever (top right) releases the pictures one after another, rack and pinion focus (2,3) two unlabeled stereoscopes with rack and pinion focus, both for 45x107 glass slides, one with black painted metal front, in good condition, (4) basic viewer with hinged mirror in used condition. (4)