This odd-looking creature is a stereo camera, adapted from the popular Exakta SLR. This Communist-bloc company produced cameras in Dresden from the 1930s until the reunification of Germany in the 1990s.
The chunky, techno styling of the Exakta started before World War 2 when it was apparently the first 35mm SLR. This c1955 stereo camera, the Stereflex, continues this design tradition. The front attachment forms two separate images on the 35mm film, and the eyepieces at the top allow the photographer to see a 3D image. It’s perfect for one of those wealthy camera collectors out there.
You can see the ebay sale here.