Mike De Sisti/Milwaukee Journal Sentinel A traditional cuckoo bird pops out of a quartz battery-operated cuckoo clock at Bill Galinsky's workshop in Waukesha, Wis. Photo Gallery ...

The clocks had been collected and restored over the past 50 years by Roman and Maz Piekarski, brothers who operated Cuckooland, a private museum in an old Cheshire schoolhouse.