Original German 3D image viewer which I believe was used to train people for reviewing aerial reconnaissance pictures. Made by Oculus. This is probably the most bulky stereoscope set up that I have seen and it also has a very precise little adjustable comparison tool. It comes with 7 different slides, some are of landscapes and some are calibration slides. It all packs up nicely in its original wooden box. The box is marked on the side with a waffen amt and the Oculus company logo.