When I want to set my mechanical wristwatch correctly, I look at another clock. So what did the manufacturer of the very first clock look at?
Asker: Ludo, age 67
Answer
To the sun. The reference for “12 o’clock” is based on when the sun, on the Greenwich meridian, is highest.
Answered by
prof.dr.ir. Alain Sarlette
control engineering, automation, robotics, dynamical systems, applied mathematics, quantum physics
university of Ghent
http://www.ugent.be
.