Tehran 24 ran a photo of a huge clock somewhere in Tehran, under the headline of “The World’s Biggest Clock.”
But is it more than 37 feet across, like the flower clock in Las Colinas, Irving, Texas?*
What is the biggest clock in the world? Surely there are some bigger.
* This site says the Tehran clock is 15 meters across — bigger than Las Colinas. The clock faces accompanying the bell of Big Ben are 7 meters across. For a panoramic view of the belfry of Big Ben, see the Parliament website.
The biggest clock face is a disputed title mainly due to lack of impartial and accurate measurements being widely available, and accepted rules for what qulaifies as a “clock face”. There are three main contenders:
- The Cevahir Mall clock in Istanbul, which claims to have 3 meter high digits (which based on pictures may make the face as large as 36 meters in diameter).
- The Colgate Clock which is located on the Jersey City waterfront, and faces Manhattan, which claims a diameter of 50 feet (15.24 meters).[1]
- The Flower clock, Abbasabad district of Tehran, which claims to measure 49.21 feet (15 meters) in diameter. It weighs in at 750 kg, and was installed on 7 June 2005.[2]
Other big clock faces
- Colgate Clock (Indiana), 1906 in New Jersey, moved to Indiana and first illumined November 17, 1924.
- St. Peter, Zürich 28.5 feet / 8.7 metres in diameter, 1534 (biggest clock face in Europe).
- Allen-Bradley Clock Tower — biggest four-faced clock
- Philadelphia City Hall hosts twenty-six foot diameter clocks on all four sides of the metal portion of the tower.
- The Bromo Seltzer Arts Tower, Baltimore, MD Built in 1911, houses four clock faces each 24 feet in diameter.
- Big Ben 7 meters (21-23 feet[3]) in diameter, 1854. — biggest four-faced chiming clock
Millard Fillmore's Bathtub 
Added.
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Didn’t know about it. Helene, it’s not listed in Wikipedia. Why don’t you go to Wikipedia and add the Duquesne Brewery clock to the list?
Go here to add it:
http://en.wikipedia.org/wiki/List_of_biggest_clock_faces
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You forgot the Duquesne Brewery Clock in Pittsburgh PA measuring at 60 ft in diameter.
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