Tray-Stereoscope ‘Stéréodrome’

Le Stéréo­drome is a robust stere­o­scope with a heavy-duty and reli­able con­struc­tion. The device exhibits a sta­ble design that remained in pro­duc­tion into the 1930s with­out sig­nif­i­cant mod­i­fi­ca­tions. The mod­el designed to accom­mo­date a pro­jec­tion lamp has a few vis­i­ble dif­fer­ences on the out­side and also dif­fers slight­ly in the arrange­ment of its mechanism.
(from: Com­pendi­um of Stereoscopes)