The camera shown is unfortunately incomplete. You can see on the top a part of an hinge and a tiny nipple nearby. Normally, a flap is attached to the hinge. Closed, it provides protection to the viewfinder and rangefinder window, but if it is open, you can see on the inside face the selenium cell. Upon opening the flap, a contact is made between the cell and the camera by means of the nipple. Mounted to the front face of the device, close to the lens is the other part of the cell and also the reading window.

The viewfinder is particularly wide (a Big Finder before its time) and allows to aim with both eyes open. A second window includes those of the rangefinder and lighting the bright frame in the viewfinder.

The design of the rewind crank is particularly studied. Unusually, the film advance is done by pressing the large lever located on the side of the lens.

The MIII is operable in half size, but the corresponding mask seems to have disappeared in most cases.

History

1873 Establishment of the Konishi-ya company. Initial implementation of photographic and lithographic materials.
1876 Relocation to Tokyo. The company is renamed Konishi Honten.
1882 Three factories are established in Tokyo, producing photographic equipment, coated paper, and lithography equipment.
1897 Introduction of the first cinematographic cameras in Japan, enabling the production of Japanese films.
1902 Establishment of a new factory in Tokyo dedicated to the production of photographic plates and papers. This factory is considered the birthplace of the Japanese photographic industry.
1903 The first photosensitive paper produced in Japan, Sakura Hakkin type paper, and the Cherry camera are introduced to the market.
1909 Opening of the Osaka Agency. Introduction of the LiIy camera.
1919 Consolidation of factories in Tokyo, forming Japan's first modern photographic organization.
1921 This organization becomes the Konishiroku Honten Company (Honten = headquarters).
1925 Introduction of Pearlette cameras.
1929 Launch of Sakura films (Sakura = Japanese cherry blossom).
1933 Expansion of the headquarters.
1936 The company becomes Konishiroku Co., Ltd. Opening of an agency in Hino, and relocation of the Sensitive Materials Production Division.
1938 Introduction of the Semipearl camera.
1940 Announcement of the production of the first Japanese color film, Sakura Natural Color Film.
1943 The company adopts its current name, Konishiroku Photo Industry Co., Ltd., and the factories are renamed.
1944 Merger with Showa Photo Industries Co., Ltd., adding the Odawara and Koyama factories to the company.
1945 End of the war, leading to a chaotic economic situation. A major reorganization is undertaken to enable the company to survive this tumultuous period.
1948 Sale of the first KONICA-branded cameras and resumption of exports.
1963 Inauguration of the large factory for the production of photographic equipment.
1967 Introduction of the world's great innovation, the SAKURACOLOR N-100, along with the world's first automatic reflex, the KONICA AUTO-REFLEX.
1968 The first automatic reflex camera (EE) incorporates through-the-lens (TTL) metering: it becomes the KONICA AUTOREFLEX T. Production of the first Japanese 24 x 36 compact rangefinder camera, the KONICA C35, in the same year.
1969 Development by Konishiroku of the world's first compact holographic camera.
1970 Start of the sale of U-Bix electrostatic dry photocopying machines. Introduction of SAKURA High Resolution Plate, ultra-fine grain, high-resolution sensitive material essential for Integrated Circuit manufacturing.
1971 Introduction of the new SAKURACOLOR. Commencement of U-Bix MARK I export.
1973 Celebration of the 100th anniversary of the company. Adoption of the new logo. Departure for a new century with renewed enthusiasm.