This film famously brought together the greatest titans of classic horror cinema: Bela Lugosi (in one of his very last performances), Lon Chaney Jr., John Carradine, Basil Rathbone, and Tor Johnson. Belgian posters from this era are significantly scarcer at auction than their U.S. or U.K. counterparts. They are highly prized for their vibrant, stylized artwork that often differs from standard studio releases.