How about splines? This was for the input shaft on my rock crusher. An automotive clutch was used, and a spline was necessary.
Making parts for the lathe, and using the lathe to make parts for the shaper....
Stamping the numbers so that they look professional is near impossible; I did a dial like that and engraved the numbers with my Gorton 3-U engraver, using a forming guide to engrave the numbers on the curvature of the dial; the roll attachment can also be used to achieve the desired result. The engraver can also be used to engrave the graduations, a stepped stop being used to limit the travel of the style to make the 3 different length lines usually seen on dials.Under power, but I have a freq drive and full control. A couple of scratches was enough each time. Wish I had a better handle on stamping the numbers.