My grandfathers tools of the trade:
The Certosport is a double-extension folding plate camera, made by Certo in Dresden, Germany, from about 1929 to 1934. I have unfortunately not found any photographs that were made with this camera.
Most of the negatives I am currently sorting, were shot with the Ikonta 521. This is a small folding camera produced from 1938 to 1954 by the German company Zeiss Ikon. The one my grandfather used was probably pre-WWII.
It can make upto 16 size 4.5 x 6 cm images on 120 type rollfilm.
The Ferrania Falco S, Italian made ca. 1949. The camera takes 120 film and makes 6 x 9 cm. negatives. Only a few negatives of these dimensions remain.
Around 1955 he entered in a contest together with my uncle. They won a Russian Leica copy, the Zorki 2-C for 35 mm film, but had no use for it, both being Zeiss Ikonto adepts. This camera was handed down to my father, who used it for holiday snapshots.