 The inside of the lid was painted with a portrait or other subject, and a goldsmith added mounts and a hinge.The popular figures of ordinary people were introduced early, and there are large numbers of models; since Buen Retiro concentrated on these, the difficulties in telling Neapolitan and Madrid pieces apart mostly affect these.Figures tend to have "exceptionally small heads, wide hands and feet, and restrained painting of both features and costume.