Swiss photographer Carl Hans Koch invented the Sinar camera in 1947 due to his dissatisfaction with the imprecise nature of wooden view cameras and the limitations of technical (e.g., Linhof Technika) and field cameras of the day. His main aim was to produce a large format camera of high precision and simple operation, with a system of parts that were readily interchangeable. The Sinar system's versatility is based on the interchangeability of parts as well as a large number of accessories that have been produced over the years. Major components (rails, bellows, lensboards, and standards) made in the 1940s are still usable with currently manufactured Sinar equipment.
This is a USED lens, Copal 3 Shutter, there is some debris, but no scratches or marks on the glass that can be seen.