'Worn Out' - Dutch museum finds rare Van Gogh drawing of tired old man

A close-up detail of Van Gogh's rare drawing. The 50cm x 30cm work was done with his favourite drawing tool, a carpenter's pencil, in his distinctive style, on water-marked paper from 1877. Photo: AP

A Dutch museum on Thursday unveiled a previously unknown work by Vincent van Gogh - a study for one of his best-known drawings, Worn Out - in which an old man sits in a chair with his head in his hands.

Van Gogh "was really interested in the ordinary person, he was also looking to express emotion," said Van Gogh Museum Director Emilie Gordenker.