lithograph by Anton Rooskens Anton Rooskens was a Dutch painter and metal teacher at the Don Bosco school in Amsterdam. As a painter he was self-taught. He was one of the founders of the Experimental Group in Holland, which later became part of the Cobra movement. Rooskens was only involved with Cobra for a short time. signed and numbered on the back. framed with passe-partout paper and a black frame. the work is in good condition.