This nicely made enamelled badge would have been given to all the railway personnel attending the congress which was held in Rome in April 1922. It is almost certainly of die-struck silver (unmarked). The central motif is a splendid eagle with the coat of arms of the house of Savoy on its breast in white and red enamel.

This is perhaps a commemorative device, possibly indicating an award of some sort, which could have been placed on the Adrian helmet that the Italians wore in WW1. It was a direct copy of the French helmet. I think it is Italian because of the crown and the general design has a marked Italian feel.