Located in the premises of Grandma's Alpine Homestead (aka Alpine-Alpa) at 1504, US Route 62, Wilmot, OH, it was built in 1972-73 as a competition to another large cuckoo clock in Frankenmuth, Michigan (now gone). The giant clock was 7.2 meters (23.5 feet) high, 3.3 meters (24 feet) wide and 4.1 metres (13.5 feet) deep. Reportedly it was noted in both the Guinness Book of Records and Ripley's Believe it or Not.
In August 2007 the clock was renovated and moved from its original location to a new location adjacent to the restaurant. However, in 2009 the restaurant was closed and the clock auctioned.
The latest news on the clock is that it will be re-erected at Walnut Creek, or Sugarcreek in Ohio. Exact new location or timetable is not known exactly, as restoration depends on funding.
Thanks to CuriusJM's post for the updated information on this, and other giant cuckoo clocks of the world.
While you're thinking big cuckoos, take a minute to visit this beautiful piece: