Developed by Frederick E. Ives the famous colour pioneer this is an 1890s mahogany and brass adjustable viewer for special three colour separation transparencies, having red, green and blue semi transparent mirrors, label 'Ives Patent Kromskop manufactory 550-552 West 25th St New York' a detachable ground glass diffusing screen, detachable eyepiece shade, three-part Kromogram of a Swiss valley and copied instructions and literature (4)
Developed by Frederick E. Ives the famous colour pioneer this is an 1890s mahogany and brass adjustable viewer for special three colour separation transparencies, having red, green and blue semi transparent mirrors, label 'Ives Patent Kromskop manufactory 550-552 West 25th St New York' a detachable ground glass diffusing screen, detachable eyepiece shade, three-part Kromogram of a Swiss valley and copied instructions and literature (4)
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
