This is an Original Photostat Model Sheet from the Disney studios. Model sheets are created in the studio as a reference tool for animators to use in order to keep character design consistent throughout a production. Model sheets were reproduced by photostat/photographic methods and passed out to the animators on a project. This piece is an actual photostat model sheet that was used by animators during production. The model sheet measures 11" x 17" and was used as a standard reference for Donald Duck's design, this looks to be from the early 50s based on the size and type of paper used for the model sheet.