Vintage 1958 Sawyer's Bi Lens 35mm Slide Viewer With Built In Light

1958 Sawyer's Bi Lens 35mm slide viewer in original factory box with all original paperwork. Factory box not in the best condition. This item was tested and still works but will look used. Battery operated. Bulb included.Sawyers bi-lens 35 is a quite unique slide viewing device. It takes standard ordinary 35 mm slides even though it looks like a 3d or stereoscopic slide viewer. Actually it may be the only device of this kind that has ever been manufactured.Measurements: 6" Long x 2" height x 4 1/4" width and tapers down to 3 1/4"All binocular style slide viewers normally take some kind of a double slide image – be it reels or stereo slide mounts. This one is different as it takes ordinary 35mm slides that were shot with any standard and unmodified 35 mm film camera.In order to view the slides properly you need to look as if you were looking at a large projector screen located in a distance. You will feel that your eyes are focusing way further than the actual slide is located. For majority of users this comes perfectly naturally and is not a problem.The surprises do not end here. Another interesting thing about this device is the image it produces. I think Sawyers were trying to pull off two things – a pseudo-3d image out of a single slide and focus at infinity that is natural and does not put strain on your eyes. They actually succeeded to some degree. The Sawyers CompanyTo begin with it would be worth saying who Sawyers were as they are long gone. I