I agree that this headstamp is pretty crude. Knowing that there were “reproductions” out there, we tried to be careful about them and questioned the owners a bit on the various rounds and their backgrounds.i frankly can’t remember all the details. I have gone through all the image files and the headstamp came from a source in Europe and I don’t know who has the actual cartridge. The misalignment is pretty obvious, but there are other Ex headstamps that are not well aligned, but I can’t recall any from Polte. Below is the image of the cartridge with that headstamp and there are no obvious (to me) problems visible on this round. Others who know this type cartridge much better than I may spot something,
Is it a legit or not! I truthfully don’t know. It is pretty clear that these are two different rounds. The a in aux is more poorly stamped in your photo and the one in your photo has corrosion on the headstamp. If it is a reproduction/fake than more than a single round was made. Comparing the two, the headstamp “irregularities” appear identical so they appear stamped by the same bunter and not hand stamped with individual punches. That seems to me to imply the rounds are legit or the person who faked them went to a lot of trouble to make a bunter!
Again, I really can’t make a judgement on this round. But, my gut feel (which has been known to be wrong) says it is legit!
PS: I went back and looked at all three of the aux headstamps, and all are pretty lightly stamped with portions of the letters/numbers not well struck. The spacing on the “318” is also not very precise.