Looks like Australian stamp could be wrong, definitely WW1 made
WW1 Swedish Mauser M10 Ammo 5 Pouch Cartridge Belt Bandolier STAR WARS
WW2 RAF EARLY WAR IRVIN SHEEPSKIN FLYING JACKET - BATTLE OF BRITAIN PERIOD
Original Air Ministry RAF WWII Leather Irvin Pilot’s Sheepskin Flying Trousers
WWII US Army Air Forces Type A-6 Flight Pants Sheepskin Flying Trousers
WW2 era Sheepskin Shearling Flying Helmet by Charles Markson Ground Crew 1940s
WWII US Army Air Forces Arctic Type A-6 Flight Pants Sheepskin Flying Trousers