My camera is a Canon EOS 10D 6.2 Mega Pixels with a 17-40 f4.0 Canon lens for normal pictures. The Macro work is done with a new lens that Canon has developed. In the old days you needed a bellows and lens setup for true macro work, this new design does away with all that equipment. The lens is a Canon MP-E 65mm f2.8 Macro Photo Lens. I can go 5x which would make a grain of rice larger than a postage stamp! Since the "f" setting is so low I can shoot at a higher shutter speed with less light, if I chose to do so. The photos in this post were done under a professional light set up.
I am still learning how to use this new lens and hope to improve my technique. This method of photography will certainly eliminate any questions about fake, engraved markings. These photos are 2x, anything larger would not fit in the frame. In my opinion, you can't really do great macro work with a telephoto lens although I have seen good results with that type of lens.
If you notice the difference in variation 3 and 4 photos the pantograph machine must have been set slightly off since the right wing of the eagle in the 4th variation is a little shorter/bent down and the lower part of the left portion of the wing not engraved. Interesting eh?
Now look at the thickness of the engraving between the two markings and the absolute uniformity in the way the Swastica is engraved between the two. Line for line these two markings are, in my opinion, made from the same pattern.
I think different patterns existed at different times since the "O" property marked gun is completely different.