Such old photos cannot be restored in the traditional way. it needs to be reconstructed using modern tools. There are no indications that he was wearing a military beret. The spread of the white space on the face is similar to the spread of face skin, and this is the basis for trying to restore the features. The final decision is up to the owner of the photo, who can judge its accuracy by the presence of similarity in features with relatives and grandchildren of the original photo owner. this is just an opinion.