A superb quality special lens by famous company Taylor-Hobson of Leicester, England. Originally designed to fit large format cameras in studio or copying houses. The iris works fine but is a little stiff and jerky, may just need slight (very careful) lubrication. The lens elements are clean and scratch free but the body of the lens shows signs of use. The body also has a closeable slot which presumably was for inserting a filter ? It is contained in well made and dedicated hardwood box which has makers label attached. The base of the box has slight damage to one corner but the box is sound, (they made them to last then).