From the collection of Charles Lippincott
Early 1976 Star Wars: A New Hope story board.
We have several Star Wars story boards made when Lucas first started working on the film. Friends over at Lucasfilm identified the drawings as Alex Tavoularis's work.
In this early storyboard, Chewbacca is a pre-McQuarrie creature which follows Lucas' original vision of a lemur-like creature with fur over his whole body and a huge apelike figure.
Two drawings are pencil on vellum, the other on paper.