First, I have never seen a German headstamp bunter from the WWII period or even the decades before WWII. In fact, though I have asked about such bunters many times and I have never encountered anyone who claims to have seen one. Since the high quality steel used for bunters was probably a very critical material during the war, I suspect they were melted down and the metal reused.
I have heard a number of times that these German bunters different from the bunters I have seen from other countries. Basically, it was claimed that the German bunters were constructed in sections (some said four sections and some said two) to allow at least the lot number to be changed without changing the whole bunter.
I have come to believe this was much more speculation rather than fact. I have looked at a LOT of German 9mm P08 headstamps and have seen double stamps, chipped bunters and other issues. I have never seen any evidence of a multiple part bunter, like a line from a misaligned bunter. I am pretty confident I have never seen a headstamp where the headstamp looks like a worn bunter but the lot number does not look worn.
Most German I have encountered is of extremely high quality, but it seems to me that the widespread use of multipart bunters would leave some evidence.
I will freely admit this is only speculation on my part, and would be glad to be proven wrong.
Has anyone seen a multiple part bunter used anywhere for modern SAA, even as far back as 1900???
Has anyone seen evidence on German headstamps going back to the 1920 that a multipe part bunter was used to create a headstamp???
I will accept that a multiple part Hobb could have been used to create bunters that were then cleaned of imperfections (see topic https://forum.cartridgecollectors.org/t/british-9mm-wwii-headstamp-variations/35658/9.