Looks like a Real German Army (not SS) pith helmet, but the felt ones never made it to Africa, they were mainly used in Italy. The feldpost stamp looks like a post war addition.  You see the square edge markings of a rubber stamp, while real German stamps were circular (and metal).  Also putting a feldpost stamp on a hat or helmet would make no sense.

The German style looks like a MC helmet.

Hat is from the Venda Defence Force an independent state (Homeland) within South Africa’s borders. Dates to about 1982, nice rarely seen headdress 

This one came from a friend of Wifey's family whom was an ZA Angolan conflict veteran, and for the life of me I can't remember what it is - Police? It was one of his war trophy's.

German style helmet in Star Wars: Skeleton Crew. There was also an M1 style helmet liner in the same scene.  mikie German style helmet in Star Wars: Skeleton Crew. There was also an M1 style helmet liner in the same scene.  mikie

Nice that would date to the 80's going by the button colour. Brown buttons are from the 70's.

Sorry about the nudes lol have to work out their style for now! 

That's impressive. Though the naked Mannequins look a bit strange 😆.

Real, repro, or fake? Could this be of a cache? Correct me if I’m wrong, but the feldpost number seems to trace back to an SS Adolf Hitler propaganda unit. Thanks. Listing link

The Sinai-Palestine campaign lasted January, 1915 to October, 1918. The date of December 9th 1917, was the day The local Ottoman government and military forces in the city of Jerusalem surrendered to the British.    I *think* it's a 77mm shell. For something like German 7.7 cm Feldkanone 96 neuer Art (7.7 cm FK 96 n.A.) Field Gun     The outer shell case was made by the Polte Armament Works in Magdeburg, Germany in December 1916. It's marked "1" and "Sp406". The shell primer is marked "Fried. Krupp AG" and "12". 

Related to a post I made in a different category. I'm trying to ID this shell case that was made into trench art. I can't tell if it's 7.7cm(77mm) or 7.5cm(75mm) case?    I'm leaning 77mm.   my understanding is the outer shell case was made by the Polte Armament Works in Magdeburg, Germany in December 1916. It's marked "1" and "Sp406". The shell primer is marked "Fried. Krupp AG 12".    link to the OG thread here:    

Another similar shell in the collection of the Australian War Memorial Museum collection related to the Sinai-Palestine campaign.   https://www.awm.gov.au/collection/C1274738