Assembly
Fitting the movement, dial, hands, crystal, crown, seals and case components into a complete watch. The depth of work can vary substantially.
The language of the bench
Terms explained
without theatre.
You do not need to be a collector to understand where value and labour enter a watch.
Anatomy of a watch
Every component has a provenance.
Selected component
Movement
The mechanism. Roger W. Smith manufactures movements on the Isle of Man; most British brands use proven Swiss or Japanese calibres.
Regulation
Adjusting a movement’s rate so that it gains or loses less time, normally checked in several positions.
Manufacture
A maker producing meaningful components rather than only specifying or assembling parts made elsewhere.
Ébauche
A base or unfinished movement supplied for another maker to finish, modify or assemble.
Escapement
The mechanism that releases stored energy in controlled increments and keeps the oscillator moving.
Balance wheel
The oscillating regulator in most mechanical wristwatches, performing a role analogous to a pendulum.
Power reserve
How long a mechanical movement runs after being fully wound.
Vitreous enamel
Powdered glass fused to a metal dial blank at high temperature, producing depth and colour but a high failure rate.
Guilloché
A repeating geometric surface pattern cut by engine-turning or produced through stamping or machining.
Chronometer
A watch or movement tested to a defined accuracy standard by an identified process or certification body.
Sub-seconds
A seconds display placed on a smaller subsidiary dial rather than using a central seconds hand.
Hand-wound
A mechanical movement powered by turning the crown rather than by an automatic rotor.
What regulation means
Small adjustments, measurable consequences.
A mechanical movement naturally runs at a slightly different rate in different positions. Regulation changes the effective length or inertia of the oscillator so the average daily gain or loss is reduced. Saying who regulated it, where and to what tolerance is useful provenance — not decorative language.