WOW, I'm impressed.
And those engine turning machines are very interesting, considering they are all mechanical.
I'm so accustomed to the CNC machines. . . . I think our last manual engraving machine was carted out of the building 10 or 12 years ago.
We'd use our engraving machine, which was more like a panograph instead of those engine turning machines, to engrave the small lettering seen on the consumer side of easy open containers. We've switched to all CNC equipment now days. We also use laser engravers to inscript identifiaction onto parts. . . We have several "swiss turn lathes" such as "Citizen" brand and "Star" brand to create very small screw's (we manufature orthopedic implants aslo , ie "bone screws")
Those engine turning machines look like a small delicate Hardinge lathe with "cam's" . . .. I'd say those cams transfer the motion through a stylus type finger - to the cutting insert, similar to an old panograph engraving machine. The cam's looked to be made from brass, an easy to machine meterial, easy to create different patterns on.
I'm wondering what type of insert they use? Borazon? Diamond? Carbide? H.S.S?
Here's a tiny borazon insert that I use with a Mitsubishi CNC lathe, except I'm not creating
delicate patterns on watch dials.
Very interesting, and the resulting dial's are classic looking.
Nice!!!

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Ham X Guy - Current Collection 
Ball Hydrocarbon Magnate
Mühle-Glashütte Teutonia II Kleine Sekunde
Rolex Datejust 16013
Rolex Daytona 116520
Rolex GMT Master II 16710
Rolex Submariner 16610
Rolex Submariner 16613
Rolex Yacht-Master 16622
Seiko Premier Automatic
Rolex Daytona 116528
Rolex Explorer II 16570
Rolex Sea-Dweller 16600
Rolex Submariner 1680 
Hamilton Jazzmaster Slim
Hamilton Khaki Field Auto
Longines Legend Diver
Longines Moonphase
Lum-Tec M16
Speedy Pro 