Yeah NT was a considered a state even back then but I think the reason would more likely be that Darwin was always being bombed and there was enough factories on the East coast to keep up with demand. Even stuff belonging to NT enlisted soldiers is rare as rocking horse s**t their serial numbers were prefixed with D or DX for Darwin instead of NT or NTX. Nt stuff is only second to stuff belonging to Aussies from New Guinea and Papua I never see any of that stuff for sale ever!!