You’ve doubtless seen those ubiquitous clock modules, especially when setting clocks for daylight savings time. You know the ones: a single AA battery, a wheel to set the time, and two or three hands ...

Nigel Barnes, a fifth-generation horologist, acknowledges that it is a “tall order” to learn to fix a clock in two days. But some manage it, he said. Nigel Barnes working with Seán Martin, who had ...