[Depicted in Indiana Jones Jr et le Violon du Metropolitan (Young Indiana Jones and the Violin of the Metropolitan), a novel written by French author Jèrôme Jacobs, published by Hachette Livre in 1997.]
In the September of 1913, Indiana is reluctant to attend school back at his home in Moab, Utah, thus a trip is made with his father to New York City, where they cross paths with the Italian Mafia over the possession of a Stradivarius, particularly with the notorious gangster Al Capone.
Alphonse Capone - an American gangster who was born in Brooklyn to Italian immigrants in 1899 (same age as Indiana), and later became a boss of organized crime during the Prohibition era in Chicago. Indiana and Capone would cross paths many times throughout his adventures.
Stradivarius - A string instrument (violin, viola, cello, etc.) that was built by members of the Italian family Stradivari (most notably Antonio Stradivari) during the 17th and 18th century. They hold a reputation of being the absolute finest quality of its field, and the term “Stradivarius” has become universally synonymous with “excellence” in general.