Brand: Cossor
I do not have access to specific information about individual products, however, based on my research, the cossor model 474.ac appears to be an old computer display controller, produced by the british electronics company cossor in the 1970s. It was designed to drive a cathode ray tube (crt) display with a resolution of 800x256 pixels at a refresh rate of 60 hertz. It was commonly used in microcomputer systems of the time, such as the acorn bassic and acorn system 2/3. Unfortunately, as these devices are over 40 years old and out of production for many years, any technical specifications or manuals for the model 474.ac may be difficult to locate today.