The Missing Treaty (Italian: Il trattato scomparso) is a 1933 Italian mystery film directed by Mario Bonnard and starring Ernesto Sabbatini, Leda Gloria and Mino Doro.
The film's sets were designed by the art director Gastone Medin.
A separate French version Le masque qui tombe was also produced.
A document containing information about a new secret weapon is stolen from the safe in an admiral's house.
This article related to an Italian film of the 1930s is a stub.