I must be fair.
Until this week I was one of the guys who though that “pae” was the new code for “kam”.
Now I compared different box labels from all three factories.
Perhaps one of you sees more than I do.
My opinion is, there were four types of linotype characters used by these factories.
I think @PJB has an argument.
The highest lot I know from “kam” looks different as the “pae” box label.
At the same time “nbe” used instead a plus a kind of cross.
It changed in 1945 to a “+” the linotype looks different.
Now to the cases.
Until, as far I know, lot 13 “nbe” used a kind of gray lacquered cases.
In lot 14 it changed to green. The gray lacquerer I do not noticed by any “kam” case.
The “S” from St+ from “nbe” and “pae” are different. (Gray cartridges on the left).
At the moment I changed the factory identification in my list to unknown.
Any information is welcome.