The three-finger salute is a salute used by the Sicilian nationalists and separatists.
It was especially used during the era of the Movement for the Independence of Sicily (1943–1951) led by Andrea Finocchiaro Aprile.Battaglia, Antonello. Separatismo siciliano: I documenti militari. Edizioni Nuova Cultura (2015). p. 109.
The salute represents the Trinacria's three legs.Uboldi, Raffaello. 25 aprile 1945: i giorni dell'odio e della libertà. Mondadori (2004). p. 86.
References
See also Trinacria Sicilian nationalism Movement for the Independence of Sicily Three-finger salute (Serbian)