This is an inferior version of a picture attributed to Botticelli (formerly Berlin, Noak collection). Other rather similar profiles exist from the circle of Botticelli, but it is uncertain whether they are portraits; they may be no more than celebrations of some female ideal.
On the reverse is a painting including a winged figure, presumably an angel, standing on a rock before a wood, in what may be an allegorical scene. The angel holds a sphere and a scroll (which is inscribed: CHI B / I / N). The object in this figure's right hand has alternatively been described as moss or a handkerchief.