A small gilt-framed portrait by the Dutch Golden Age painter Gerard Dou (1613-1675) and a Chinese Northern Song dynasty (960-1127) Ru ware brush washer are both expected to bring six figures in Ahlers & Ogletree’s Spring Estates & Collections auction scheduled for Thursday, May 8th, online and live in the Ahlers & Ogletree showroom at 1788 Ellsworth Industrial Boulevard.