The first miniature built from Jefferies' drawings was a four-inch scale model. Desilu Studios, which was producing "Star Trek", hired experienced film and television modelmaker Richard C. Datin to make a pre-production model. Datin used a subcontractor with a large lathe for major subcomponents and otherwise worked on the model for about 110 hours in November 1964. The model was made mostly of pine, with Plexiglass and brass details. Datin made minor changes after Roddenberry's review, and he submitted the completed model – which cost about $600 – to Desilu in December 1964.