Godfrey
somewhat colored
The SWC finder has a feature that I wish the makers of wide angle accessory finders for other cameras would copy: The inclusion of a bubble level in the view. Leveling the camera can be very important when shooting with extreme wide angle lenses, and being able to see the bubble level at the moment of exposure is very helpful, especially for hand-held photography. I'd like it if Carl Zeiss, Leica, and Cosina would consider adding this convenience to their finders wider than 28mm or so.
With most EVF/LCD cameras of recent vintage, the camera display can be configured to provide level indication in the display... I use it all the time with my Olympus E-M1, Hasselblad 907x and Leica CL. But I agree that the SWC's viewfinder was wonderful in this regard. The earlier cameras (at least up to my '1979 SWC/M) had the bubble level on the body with a prism to the side of the viewfinder optics so you could see it easily. The later models (certainly as late as the 903SWC, but possibly earlier) incorporated the bubble level into the viewfinder itself.
BTW: just had a chance to review the last five or six pages of posts in this thread. Lovely photos posted, everyone! Bravo! 🙂
G