La amazona disfrazada

Alberto Collo is charged with compiling a survey of his country's cavalry positions. Emilio Ghione feeds him some knockout drops and steals the documents. He sells them to his nation (in the German print called 'Silistria'; war was still four months away and Bulgarian cities made a suitable substitute). Collo is found guilty of treason. When his wife finds Ghione's monogrammed cufflinks, she works out who the villain is. Using her 'Amazonian' riding abilities, she joins a traveling circus as 'The Masked Amazon', encounters Ghione and forces him to give her his correspondence about the espionage.

It's a rather simple and straightforward story, with a silly denouement, but it is well shot by Giorgio Ricci (the copy I saw was tinted) and the actors are very good in their performances. At an hour's length it's as good a spy feature as you're likely to find for its year.