This has nothing to do with watch faces....except

[birkb]

Spinner

[tom.vannes]

Sure.
I search for animations and re-create them and try to figure out the mathematical formulas needed.
This one was easier than I thought, but kind of liked the effect.

I got it from:

Stirling Engines Animation GIF

[russellcresser]

Nice print @birkb . I think a few Face Makers have printers. I have a heavily modified Pursa Clone. Face Making takes most of the Hobby Time.