Chain-stereoscope ‘Le Phénix’ with interchangeable belt

‘Le Phénix’ is an ultra-com­pact revolv­ing stere­o­scope. It fea­tures a belt with wood­en bars that hold detach­able met­al stere­oview hold­ers. The belt is sus­pend­ed on a four-sided prism met­al bar with a large knob on the right end. Turn­ing the knob advances the images sequen­tial­ly. Flip­ping back the top of the view­er, lift­ing the belt enables the bar to slide out for easy belt replace­ment. A fold-out mir­ror at the back adjusts light for opti­mal image illumination.
The view­er illus­trat­ed seems to be an ear­ly ver­sion with all wood­en knobs, while oth­er ver­sions have met­al knobs often seen on oth­er Bize devices. The lat­er ver­sion has a sec­ond large knob on the left side that has to be unscrewed to exchange the belt.

Fur­ther read­ing: Stere­oscopy His­to­ry Series — Lucien Bize (A. Ruiter)