3D scans of a wooden plate holder for stereo micro photography

3D scans of a wooden plate holder for stereo micro photography (open and closed), produced around 1890. The holder was used on a camera that was mounted to a microscope via an adapter, not unlike today. The plate was placed in a slider which allowed the plates to be shifted by the amount required to simulate stereoscopic vision. The correct distance was indicated by notches in the handle. The holder was used by the Austrian Pioneer of microphotography and founder of the Austrian Microphotographic Society Ferdinand Pfeiffer von Wellheim.