My definition of "by hand" in this case is mentioned in what I initially wrote, and in my comment to ZSHSZ, the use of handheld rotary tools by craftspeople to polish the anglage after machining. This "by hand" isn't utilized across the board with high end brand's offerings like some might think. Audemars Piguet doesn't use rotary tools on the anglage for Cal. 3120, 4302, 4401, 5900, and 7121 to name some examples. H. Moser & Cie and Parmigiani Fleurier are another two brands which use rotary tools sparingly. You mention Jaeger-LeCoultre, a lot of their offerings don't even have polished bevels, especially since their use of base movements extends to perpetual calendars. They even downgraded the Duometre in recent years to have flat, milled anglage, just look at a recent review like the one from SJX. Also, I should say that I don't think milling marks leftover are a sign of poor quality either. As I mentioned, it's natural human error.