Stereo Realist Red Button Viewer

The so-called "red button" viewer is the model ST-61, "a de luxe piece of equipment, made entirely of black plastic except for the lenses" (that's taken verbatim from the "Stereo Realist Manual" by Morgan and Lester). That's actually how it started for me since I got the viewer before getting anything else, actually even before knowing about stereo photography (apart from the ViewMaster stuff which I was collecting at the time). The viewer came into my possession right after I saw it in the "free" bin of a garage sale in upstate New-York. Had no idea what it was was but it looked cool and that's what got me started into stereo photography.