Super Sport Dolly
This is my Certo Super Sport Dolly, with an uncoated 75 mm f/2.8 Tessar and a coupled rangefinder. The RF is an odd one, not like the RF-spot ones I'm familiar with; instead there's an odd yellowish second image that covers half the view in the RF window; you have to have your eye in just the right place to see two images. It's pretty accurate though; or it is when I manage to keep my finger out of the way of the lower RF window. The other window in the rangefinder unit is an extinction-type exposure meter.
The camera's from about 1938-39, and was made in Dresden. It can take either 2¼" square (6x6 cm) or 2¼x1⅝" (6x4.5 cm), with interchangeable masks (I have both masks, thanks to having bought several of these cameras). I have two in working order; the one above is (I think) a model A; the other one has a less good lens, and no rangefinder, but can be adapted to accept plates (tiny plates) as well as roll film, which I think makes it a model C. This manual covers both cameras.
[Edit, November 2010: I just had a real scare with this camera. The RF stopped engaging correctly with the connecting rod from the lens. In fact, the coupling made a disturbing rattle when I folded the camera up. I thought at first I'd left it at close focus (you have to return it near to infinity for it to shut), but it wasn't that. The whole RF unit had got slightly tilted backwards, so the spindle of the rotating mirror was coming into the camera body at an angle. This must have involved significant pressure on the RF, and I'm surprised nothing broke. Anyhow, it seems to be possible because there's a card spacer under the RF, allowing a little flexibility in its mounting. When I started taking out the screws of the end-covers of the RF, there was a slight click, and the whole thing went back into place. Still seems accurate, too. ]