Stereo-Viewer 6x13cm prints this had a body of

this had a body of pyramid form

1930 --- 329265 --- Contessa-Nettel Doppel-Anastigmat 4

leather covered aluminium body

Ernoplast 4

Stereo-Viewer 6x13cm prints this had a body ofWalnut veneered body, this particular design patent was commonly used by Negretti and Zambra of London who based many of their viewers on Charles John Rowsell's design. The viewer has a platform hinged base with adjustable height and at the front are two lenses for stereo use that are hinged to lie flat on the platform when not in use. A Graphoscope lens can then be hinged from underneath the platform to the viewing position. This can then be removed