Though the model is not as famous as the creator of this print, he is hardly unknown, as he is none other than Dr Gachet: a friend of Van Gogh who taught him how to etch.
Vincent Van Gogh (1853-1890), Portrait of Dr. Gachet (Man with a Pipe), 1890, etching and drypoint, black proof on watermarked ivory laid paper, 14.8 x 18 cm/5.8 x 7 in.
Estimate: €60,000/80,000