Caproni Bergamaschi CA 135 Tipo Spagna. This one at the Salon Aeronautico in Milan, 1937
Don't know if it is a mock-up, with that painted-in glasswork ?
interesting sidebar here: https://www.laahs.com/those-peruvian-ca-135s/
Thanks for that link Rob. Interesting indeed. Didn't know that several 135's ended up in Peru and then later mysteriously disappeared!