Anton Coppola, who appeared in the children’s chorus for the 1926 American premiere of Puccini’s uncompleted “Turandot,” conducted his own ending to the work some nine decades later, and in between had one of the longest careers as a maestro in modern times, died on Monday at his home in Manhattan. He was 102.

His daughter, Lucia Coppola, confirmed his death.

Mr. Coppola was the elder statesman of the Coppola movie clan, which includes Francis Ford Coppola (nephew), Talia Shire (niece), Nicolas Cage (grandnephew) and Sofia Coppola (grandniece). His brother Carmine, who died in 1991, wrote music for his own son Francis Ford’s three “Godfather” movies as well as “Apocalypse Now” (1979).

Anton, too, had a role in the family film business, appearing as the conductor of the opera “Cavalleria Rusticana” in a scene from “Godfather III” (1990) and conducting the score to Francis Ford Coppola’s “Bram Stoker’s Dracula” (1992).

The creative flow went the other way. Francis Ford Coppola suggested that his Uncle Anton write an opera about Sacco and Vanzetti, the Italian anarchists executed — wrongly, many believe — in 1927. The resulting work was what Anton Coppola considered his crowning glory, “Sacco and Vanzetti.”