Sunderland 'Golden Horn' crashed Lisbon 1943
The Portuguese Public Security Police (PSP) constables wore a custodian-style helmet from 1936 to 1958. The helmets were made of cork, covered with dark blue fabric, having on the front a silver PSP star (six points star with the Portuguese Shield in the centre).
The angle is not the best, but that could well be a six-pointed star.
Portugal has three policing agencies, the Polícia Judiciária wasn't formed until 1945 so can be discounted.
Te apparent star on the helmet possibly comes from the units insignia.
I see you beat me to it barry
- Guarda Nacional Republicana: National Republican Guard. A gendarmerie that mainly work out of major cities but in 98% of the Portuguese territory and provides a national highway patrol, a fiscal guard and a national environment protection police.
- Polícia de Segurança Pública: Public Security Police. Civilian police force that works in larger urban areas.
- Polícia Judiciária: Judicial Police. Overseen by the Public Ministry, they investigate criminal cases
- Exclusive powers: responsible for weapons control, ammunition and explosives, outside the authority of the armed and security forces, as well as guaranteeing the security for personnel of domestic and foreign entities, and other citizens subject to threat of person
- Special powers: responsible for airport security and the protection of diplomatic missions both locally and internationally
Te apparent star on the helmet possibly comes from the units insignia.
I see you beat me to it barry