Moineaux de Paris

Moineaux de Paris English Sparrows of Paris, is a French comedy drama film from 1952, directed and written by Maurice Cloche, starring JeanPierre Aumont and Louis de Funs.

Impresario Mr Smith and his daughter want to engage a group of French musicians. On this occasion Peggy Smith wears a necklace with a locket. One of the musicians identifies the locket as property of his grandmother. When Ms Smith insists on keeping it, the musician calls for his ancestors and the reborn French elite soldier Csarin answers.

Source: Wikipedia