What is horology?

Horology is the craft and science of measuring time: the making, repairing and conserving of clocks and watches. It runs from the heavy wheelwork of a turret clock to the hair-fine parts of a wristwatch, and it is one of the fields where England once led the world - the country of John Harrison, Thomas Tompion, George Graham and Thomas Mudge. The archive’s way into it is Seth Kennedy, a mechanical engineer who came to watchmaking with no formal training and now makes and engine-turns watch cases by hand. He is the archive’s first horological subject, and what struck me is how much of the craft is invisible: the part you admire is the dial, but the work is everything turning behind it.

Horology is the umbrella; under it sit several trades. Clockmaking makes and mends clocks - larger timekeepers, often driven by a falling weight or a coiled spring and regulated by a pendulum. Watchmaking does the same for watches: portable, spring-driven, and built at a scale where the parts are measured in fractions of a millimetre. Around them are the specialist hands - the case maker who makes the metal case, the dial maker, the engine turner who cuts the fine geometric patterns into cases and dials on a special lathe, and the conservator who keeps historic pieces running.

Seth Kennedy sits across several of these at once - watchmaker, case maker and engine turner - which is itself a sign of the times: where the old trade was deeply divided among specialists, a modern independent maker often has to hold many of the skills in one pair of hands. Horology is not one job. It is a family of precision crafts that together turn stored energy into measured time.

The movement is the working mechanism. The going train is the gear train that carries power to the hands; the mainspring or weight is the power source. The escapement is the mechanism that lets the train advance one regulated step at a time, governed by the oscillator - a pendulum in a clock, a balance wheel and hairspring in a watch. A complication is any function beyond plain timekeeping (a calendar, a chronograph, a moonphase). Engine turning (guilloché) is the lathe-cut geometric ornament on cases and dials. Jewels are the hard bearings that reduce wear at the pivots.

A timepiece is a system for releasing energy slowly and evenly. Power is stored in a spring or a weight; the going train gears it down; the escapement, locked to the swing of a pendulum or the beat of a balance, releases it tooth by tooth, and that release is the tick. The maker’s art is in getting every pivot, tooth and bearing true enough that the whole thing runs steadily for years - and, on the finishing side, in making it beautiful: bevelled and polished steel, engine-turned dials, a case made and decorated by hand.

At Seth Kennedy’s end of the craft, that means working metal to tolerances a fraction of a hair’s width, and cutting engine-turning on a rose engine or straight-line lathe where a single slip ruins the piece. It is the opposite of fast: the reward is an object that keeps time, and keeps being repairable, for a century or more. That repairability is part of the point of horology as a heritage craft - a well-made mechanical watch is meant to outlive its owner and be serviced, not thrown away.

The archive opened its horological coverage with Seth Kennedy, a QEST scholar who reached watchmaking by way of mechanical engineering and now works in England making and engine-turning watch cases by hand. He is the first subject in the archive’s Horology pillar, the strand that gathers the timekeeping and precision crafts across the categories. Through him the archive has seen the case-making and engine-turning side of the trade - the part that gives a watch its face and its finish - first hand.

British horology is in an interesting moment. The volume industry was lost to Switzerland and then to quartz and digital decades ago, but the craft survives at the high end and is, in places, reviving: a generation of independent English watchmakers is making again, restoration and conservation keep clockmakers in steady work, and there is real demand for hand-finished mechanical pieces. The pressure is on training - the skills take years, the entry routes are narrow - which is exactly why bodies like the British Horological Institute and QEST, and routes like Seth Kennedy’s, matter.

It is learned through horological schools, apprenticeship and scholarship together. The archive’s Learn a Craft directory and Seth Kennedy’s subject page point the way in.

What is the difference between clockmaking and watchmaking?
Both are branches of horology. Clockmaking makes and repairs clocks - larger, often weight- or pendulum-driven timekeepers. Watchmaking works at a far smaller scale on portable, spring-driven watches, where the parts are tiny and the tolerances finer. The principles are shared; the scale and handwork differ.

What is an escapement?
The escapement is the heart of a mechanical timepiece: the mechanism that releases the gear train one step at a time, in time with a regulating oscillator (a pendulum in a clock, a balance wheel in a watch). It is what turns stored energy into the steady tick that measures time.

Is horology still taught in England?
Yes. It is taught through the British Horological Institute and specialist schools, and supported by bodies such as QEST and the Worshipful Company of Clockmakers. England has a deep horological heritage, and the hand skills survive in a small profession of makers, restorers and conservators.