The dial on the Langematik Anniversary that I wear has a bunch of little things that are visible with a loupe. There are some tiny dark spots, and some of the black printing is too light/missing (like in the word "Glashutte"). There's also a semicircular scratch in the seconds subdial where it looks like the wider part of the second hand might've touched/dragged on the dial a bit. And there's a bit of a "bump" in one of the red numerals. But I can't see any of that with my naked eye and don't really care. Someone with better vision might be able to see some of these things with their naked eye. Also, I had the non-AR-coated crystal (which is more forgiving) replaced with an AR-coated crystal, which means flaws are easier to see.
Another one of these same dials is much better. I didn't see any black dots (impurities), the black printing was bolder, etc. But on both examples, the edges of the seconds subdial have many chips (not visible to the naked eye).
I haven't examined any of the 1815 Tourbillon enamel dials (c.2018) under a loupe but am curious about them.