The present picture is based on Van Dyck's portrait of Gaspar de Crayer, painted en grisaille and engraved by Paulus Pontius. The present work appears to be a copy after the engraving as it is in reverse to the original (see S.J. Barnes, et. al., Van Dyck, A Complete Catalogue of the Paintings, Yale, 2004, p. 367, no. III. 149).