PIERLUIGI BOSSI detto SIBO' (Milano 1907-2000) Volando su Siena 1939 tempera, pastels and pencil on board 83.2x59.6 cm signed lower left on the reverse signed, dated and titled   The artwork has a certificate of authenticity by Simona Bossi. The artwork is registered at the Archivio Simona Bossi with n.74.