Heads of the Virgin and St. Anne

Inscribed at lower left, on made up section, in pen and brown ink, cut off; on verso, at upper left, in black chalk, "55? Andrea del Sarto."; at upper right, in pencil, "23" (encircled); at center, "N [o superscript] 48" (cancelled); beneath this, "N [o superscript] 39"; to the right, "44"; at lower left, "5" (encircled).