Yes, you are exactly right. Each Nissan subsidiary (Nisan North America, Nissan Australia, etc) had their own specific models and trims.

In Japan there was STD (lowest), DX, GL and GX (highest). There was also an odd "Semi-DX" that some Nissan literature refers to.

The Japanese STD came with front-drum brakes, a la Aussie sedans. However, all US sedans had "Deluxe" badging, and front disc brakes, which matches the Japanese DX trim level. But in the US, sedans came with GL hubcaps, so it's not exactly the same as the Japanese-market trim levels.



Brochure showing 1200 GX, 1200 GL, 1200 DX, 1200 Semi-DX & 1200 STD