My 25-year-old cuckoo clock hung on the dining room wall silent for over two years. Finally, this month, I decided to see if I could repair the clock to produce the comforting, hourly cuckoo whistle ...

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 ...