PN990 Grimy Old MillPart of the new Industrial Buildings. The Grimy Old Mill is a Big Mill that would look great on any layout. Build as a low relief building or stand alone. Dont forget to also check out the new Overbridge, a great additional kit to link the Grimy Old Mill with either the PN187 Old Factory or PN188 Brewery. Mix and match with other Industrial Buildings from our red brick range.