Tray-Stereoscope ‘Stéréodrome Métallique’ / ‘La Tulipe’

The Stéréo­drome Métallique belongs to the last gen­er­a­tion of tray-based stere­o­scopes intro­duced at the end of the 1920s. The stere­o­scope is con­struct­ed entire­ly from met­al and has a more mod­ern appear­ance com­pared with the more com­mon tray-based view­ers. To achieve the slim design of the base, the Stéréo­drome’s mech­a­nism was mod­i­fied so that only one fin­ger (instead of the orig­i­nal two) now lifts the slide.
(from: Com­pendi­um of Stereoscopes)