At Mount Congreve, Mr. Curran checked on the most valuable clock in the collection, an elaborate five-foot-tall cuckoo that he had unwrapped earlier and was sitting on the floor.

“The clocks are running all day long and the idea is to encourage people to go inside and afterwards buy a cuckoo clock,” explains Ingolf Haas of Rombach & Haas, a family-owned, fourth ...

The country that made the cuckoo bird famous with its clocks is now worried the bird might follow the tragic path of the dodo -- into extinction. Nature and clock preservationists are teaming up ...