Oh you miss the point. Holden never gave them a code and that is what is important. It is the only thing that people have that is black and white to identify vehicles. A shipping container of paperwork that no one has access to indicating what GMH intended has no use to anyone. They never gave Sandman any unique model codes.
The few unique trim codes and option combinations are how a Sandman is seperates from other Holden commercials. Yet ther are Sandmans that are identical to standard commercials and will never be proven.
They are not a seperate model and that is the black and white reality. All they had to do make then a model was change one letter on the tags. Mor N to another letter. They didn't.