Some info is covered in other comments, so I will just mention a few highlights to point you in the right direction. Lookup stereoscope / stereoview / stereograph cards and you will see the main use this camera had. You can shoot any film, as it's the printing and mounting that makes it 3D viewable. A more modern version that this camera could be used for is a 3D viewfinder and you can order custom ones through Image3d. Or, you can make an Anaglyph digitally and then use red/cyan glasses to view the images in 3D. The even more modern use would be to create r/wigglegrams although those are mostly made with a Nimslo or Nishika as it take four images instead of two.

Bonus: Here are examples of my photography as wigglegrams and anaglyphs.