This is up there with Claude Paillard creating early 1920s-style triode vacuum tubes entirely by hand in his home workshop:
Chris from Clickspring is building a skeleton clock from scratch using a home machinist’s shop, and documenting it in lavish, hypnotic detail in his Youtube channel.
via Watch: a home machinist makes a clock from scratch, right down to the screws and washers / Boing Boing.
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