[Sturmbock]

Then,i imagine a pilot or a mechanic on airfield when reading such document with "Me109" written on it:

"Oh god,what dumb guys at the DBenz factory,don't they know we're using Bf109s and not Me109s,Shame on them!"

Laughing

BTW,what about the Mtt papers (see above) among many others that clearly indicates the "Me" prefix?
I can admitt some did "errors" or are subcontractor.But AFAIK,Mtt isn't a subcontractor of itself and the guys which drew those performances curves weren't clumsy enough to begin their performance reports with...an "error".

"...although it came to overlapping, most often by subcontractors..."

That's all