Joe - I think you didn’t get what I meant. There would be no need for DWM to take a negative tact to reply to orders. They simply would supply the blackened case rounds regardless of not having the “A” on the headstamp for any “carbine ammo” order. If anyone noticed at all, they could easily “clue them in.”
Just because a case number was assigned, doesn’t necessarily mean that rounds were always headstamped that way. There are many sporting rounds that have the caliber stamped on the head rather than the case number - I am talking here about DWM production. There are likely DWM rounds with NO headstamp that were assigned a case number. The round known to most as 7.65 Glisenti, but boxed by DWM simply as 7.65 mm Parabellum 471C, do not have any headstamp for example.
The DWM case register was simply there in-house record of what the had developed. It was not written in stone with them that the case number would appear on the headstamp, or that every variation of a given case number (the small letters after the number, for example, would appear as part of the headstamp.
I don’t know nay other way to explain it. It is all conjecture anyway, since I am not sure anyone knows why the did everything they did. Why did they continue to use the * D.M. * K. headstampstamp, for example, long after the company became D.W.M.?
Unfortunately, there are hundreds of questions that have never been answered even by intense research. I spent a year researching an article on the 7.65 mm Glisenti cartridge so I could wow everyone with what I found out about it and what I knew about it. My article, when all was said and done, had to wow people by my explanation that we really knew nothing about the cartridge, and weren’t even sure it had anything to do with Glisenti, or at least the DWM production of the cartridge. Some of this stuff will never be answered, and I have a hunch that if all the people that worked with this stuff originally could reappear on earth, they would be amazed by the interest in things they probably considered very unimportant.
Regarding the headstamping of different loadings, remember, it was years before they started, in America, to use the +P designation on headstamps of cartridges where the load exceeded the normal standards for any given caliber. That is similar to the “A” situation on carbine loads, which at least were identified from the first with a blackened case.