The book that comes with the UHR Double Eagle emphasizes how the Mint switched from using the venerable Janvier reducing lathe to using a progression of computerized numerically controlled cutters to make the master hubs (yes, plural). The US Mint doesn't seem to be a technology leader most of the time, so: who did it first?
They usually don't tell you. The US Mint switched over in the past few years, but I can't tell you the exact date.
