When I was at high school, I made a discovery in school's attic: an EUB body strip of bridge, tuners etc. I traded it with the janitor for a bottle of cognac. My father, skilled in everything, made all the missing parts for me. He also made the tuning pegs from walnut wood. I remember he worked on them very hard, as they had to be very exact and the holes were not all exactly the same. In the end it worked, as when you tuned it, it stayed tuned (for an hour). But practically, it was unusable: the slightest possible rotation of the peg resulted in changing the pitch at least a halftone. As a begginer who could hardly hear whether the bass is in tune, it was a really an invincible issue for me.
I'd wonder if the real tuning pegs were actually used in bass crafting ever.
Huygens invented pendulum clocks in 1652, so we can assume that a precise cogwheel surely was not a novelty in times of
common practice period. I can't think of any advantage of pegs over machines. Does anyone know better?