Leica III SLR camera and case

During the 20th century, the new technology developed for image-recording devices and their simplification spurred the growth of commercial photography, doing away with the complicated procedures of the previous century and therefore benefiting both professional and amateur photographers.
This camera is descended from the first 35mm camera in history: the Leica I, first marketed in 1924 by Leitz , a company that manufactures optical devices. The Leica III was introduced in 1933, with a total production of 12,834 units. It improved on the Leica II in several aspects, including the shutter, an adjustable viewfinder for changing dioptres, strap lugs on the sides so it could be hung round the neck and, as always, the brand's signature interchangeable screw-mount lenses.
The 5 cm Summar lens, with six elements in four groups , also appeared in 1933 and was designed especially for Leica by Max Berek. The biggest drawback was the haze that appeared in shots taken at full aperture.
This camera documented much of the history of the National Archaeological Museum and its experiences during the Spanish Civil War and post-war years. It may even be the one used by the renowned heritage photographer Aurelio Pérez Rioja, on staff at the museum for part of that period.