Antonio Fornaroli, Milan
Thence by descent
'Venini', Domus, no. 361, December 1959, p. 46 for a similar example
Marino Barovier and Carla Sonego, Venini: Luce 1921-1985, exh. cat., Le Stanze del Vetro, Venice, 2022, throughout for similar examples of the shades