This type of rivets is compatible with the war period. That type of brown color is generally associated with the Spanish Civil War. I think the star was added later (children? theatre?)

Thank you all for the in-depth and detailed information an answer questions I had about the helmet for a long time. Thanks again.

Good eye, that's efectively an M 33. Mussolini provided a quantity of M33s to the rebel troops, with deliveries starting in 1938. prior to that It would have been captured to Italian CTV troops in Guadalajara or Aragon Battles or later in the Ebre, making it a good find, Interesting one. The markings should help tracing It's origin.

Looks more like a Soviet Red Army helmet

Ethiopian Capture?

Captured from Italian fascist volunteers. Red star was commonly used to distinguish Republican forces.

Spanish Civil War Republican