Today’s item is a “Prix de Tir”, an award given to soldiers who were considered as marksmen/sharpshooters. The weapons used were revolvers or rifles for NCOs, rifles for corporals and privates.
During the competitions, the best soldier was awarded a golden plated award, the second and the third one a silver one, like the model presented today. This prize was worn for one year and the soldier had to do another competition and to be classified again to be authorized to keep it.
This prize is very similar to the symbol of French Chasseurs, therefore keep it in mind when you study French uniforms (one example here).