From the early 19th Dynasty onwards a number of coffins would nest one within the other and often contain an inner mummy board lying on top of the mummy, and underneath this a cartonnage mask. Cf. W. C. Hayes, The Scepter of Egypt, II, New York, 1959, pp. 414-415, no. 264 for an inner cover. These inner mummy boards would be flat and depict the deceased in the dress of their every day life.
Part-decorated mummy boards where only the top half with wig, face and collar painted are quite rare. See BMA.37.1520E, in The Brooklyn Museum, New York, for a a mummy board depicting a man with his arms held by his sides, part-decorated and dressed for everyday life.