Revolver microprojector, with revolving turret with five objectives, mechanical stage and integral lamp, by Carl Zeiss, German, 1965-1980 Revolver microprojector 1965-1980
Microprojector, with x4, x10 and x40 objectives, by W. Watson & Sons Limited, English, 1960-1975 Microprojector, with x4 1960-1975
