Pix of the estate AE1906

[Big Norm]

I have a question that I would like to ask the membership here. In looking at the above gun, I noticed machine marks on the rabbit ears. So I looked at my two 1906 AE's and one that I have in the 33000 range (the same range as the above guns range) and it also has machine marks on the rabbit ears. But my second gun is in the 63000 range and it does NOT have the machine marks on the rabbit ears. Is there a point at which these guns improved their quality and stopped showing the machine marks?

Curiousity got the best of me. So, I looked at my two conseutive numbered Portuguese M2's and they show light amounts of machine markings. I also looked at two 1900's (one an AE and one not) and they showed no machine markings. And finally, I looked at a Swiss Cross-in Shield and the machine markings were about the same as my Portuguese M2's. (That is very light machine markings.) I am sure that none of my guns have been redone.
Big Norm