Another vote for the Owl stereo viewer. I have a Stereo Realist for 35mm film. It works well, but the ergonomics are terrible. If I was buying again, I'd probably get a Revere 33 instead. I've also done a stereo with my medium format Bronica. Here's a cross-eye view.
Orchids in Stereo by
Howard Sandler, on Flickr
You don't have to have a dedicated stereo camera or even two cameras. You can use any camera if the subject is not moving. You just take two pictures using the "cha cha" technique; i.e. move the camera slightly laterally, preferably on a tripod, between the two shots, or displace the camera a lot for a hyperstereo shot (good for landscapes).
True stereo cameras, or two synchronized cameras, really shine of course, when there's action or a single decisive moment, like in the shot below of the lady and child. I try to look for those opportunities when I'm out with the Stereo Realist.
Canadian tulip festival, Ottawa by
Howard Sandler, on Flickr
..your stereo pairs are the wrong way around for my viewing technique, and the 2-shot is a little too far apart to 'fuse'. Can you repost??