Atomic clock is faster than mechanical clock and it is the most accurate of all clocks in the world.
The National Bureau of Standards and Technology uses the Atomic clock. These clocks are said to be the most accurate clocks.
Atomic clocks are in Federal Office of Metrology-Bern-Switzerland, National Physical Laboratory-Teddington-London-United Kingdom and at National Metrology Centre-Singapore. Atomic clocks are also in other countries as well.
Howard Miller Clock Company offers a wide range of clocks, including wall clocks, mantel clocks, floor clocks (grandfather clocks), table clocks, and atomic clocks. They also offer specialty clocks like chiming clocks, musical clocks, weather clocks, and indoor/outdoor clocks.
There are wall atomic clocks available for sale online. Check with Craigslist or eBay to look for what you need.
atomic clocks
The purpose of all clocks (e.g. mechanical clock, water clock, electronic clock, atomic clock) is to measure the passage of time.
The Clock Depot is a dedicated site for all things clocks. From the drop down menu it shows that their product range includes grandfather clocks, alarm clocks, anniversary clocks, antique clocks, atomic clocks, carriage clocks (as indicated), cuckoo clocks, mantel clocks, nautical clocks and more.
Any atomic clock will automatically set the time.
Greenwich, England all US atomic clocks sync with it
Atomic clocks are the most accurate clocks that are available to the general public. To date, the most accurate clock made is the so-called quantum logic clock, which is accurate to about one second in 3.7 billion years.
Atomic watches receive time information via radio from one of a number of atomic clocks, making them as accurate as said clock within radio range.