This thread is about the appreciation of watches, as well as the micro-engineering and materials engineering that are required to make a fine watch, clock, or other timepiece.
So to bring some educational content to this thread, if anyone is interested in understanding the differences between a vertical clutch chronograph and a horizontally coupled chronograph, and why vertical coupling is technically superior, this is a great article on the subject:
This is a really interesting article that I haven't even had the chance to finish yet, but which is already fascinating to those interested in the technical aspects of mechanical movements:
It covers the development of the first cam actuated split second chronograph movement and how it differs from traditional column wheel split second approaches.
One of the most commonly misunderstood aspects of mechanical movements is the difference between adjustment and regulation.
Regulation only moves the center point of the spread between the rates the watch runs at in different positions, at different temperatures, at at different extends of mainspring wind, but it does not alter the spreads between those rates.
Instead, it is adjustment that does that. Adjustment involves, at a minimum, manipulating the geometry of the hairspring such that it is in the shape it was designed to operate in (typically flat, but not always), that its coils are spaced concentrically, and that it is centered between the regulating pins (if it is a regulated balance movement).
It is beyond this baseline, however, that the real skills of adjustment come into play. For free sprung balance movements, the careful setting of the eccentric screws in the balance can simultaneously alter the adjustment and the regulation because they simultaneously affect the poise of the balance wheel and the rate of the balance wheel.
For regulated balances, beyond a basic level, adjustment becomes something of a voodoo art where the deliberate manipulation of the hairspring geometry *out of* the baseline can be used to reduce the effect of different positions, temperatures and levels of wind on the escapement by deliberately misshaping the hairspring in such a way as to anticipate how the hairspring will be affected by those factors. In truth very few watchmakers still do very much of this kind of adjustment on regulated balances, as it is both time consuming and highly skill intensive.