Tower 83 Stereo (Sears branded Iloca Stereo IIa) ~1955-57
35mm 5p stereo slides
Prontor-S shutter (1,2,5,10,25,50,100,300-B)
Twin Isco Gottingen Westar lenses (Cooke triplets) with central focus. (note the CROUPS misspell in the focus settings)

Viewfinder is at the bottom of the camera and an accessory rapid finder would be nice to find.

I think the shutter mechanism is in the center of the camera and triggers both leaves simultaneously.

For the page:
camera-wiki.org/wiki/Iloca_Stereo_II