Introduced around 1954, this camera produces stereo pairs 24mm square that can be mounted on supports Stereo Realist 5P (21x24mm). There is a common example of the stereo format is in good condition, works completely with signs of light use only - please see the pictures to see the condition. Not Minty - signs sample use - but is in good condition with only slight signs of use - a good collector piece that is fully usable. A manual is available in https://www.butkus.org/chinon/stereo/stere-all/stere-all.pdf