My Dad was a semi pro photographer when I was a toddler back in the early 60's.

He acquired a black metal stereoscopic camera to try out.

To my childs eyes it looked like a futuristic tank or sumbmarine battle machine
like off Stingray or Thunderbirds.

Next time he went to use that camera he found it battered and in pieces
after I'd played with it in the back garden
to fight an intergalactic war with my airfix soldiers....

When I was a student in the early 80's I followed in his footsteps
and became seriously interested in stereo photographic applications,
but was too over occupied with live music, drinking, and girls
to ever get round to actually sorting out the equipment to make my own 3D photos.