Stella Rubinstein-Bloch. "Sculpture and Bronzes, Mediaeval and Renaissance." Catalogue of the Collection of George and Florence Blumenthal. 2, Paris, 1926, pl. XXXIII, illustrates this as the lunette of the frame around "A Relief in Stucco Representing the Virgin and Child," by Antonio Rossellino (MMA, 41.190.40a).
Raffaele Casciaro. Letter to James Draper. August 8, 1997, believes that this lunette could be by Ambrogio Bevilacqua, or at least by a Milanese painter very close to him at the end of the fifteenth century.