About Hoptroff

Contact Details

You can email us at info@hoptroff.com or call +44 20 7127 0605
For customer support, contact support@hoptroff.com

About Us

Hoptroff London is based in London, England, and is known for its focus on high accuracy and innovative complications. We were the first watchmaker to use an atomic clock in place of a balance spring or a quartz crystal, creating timepieces that are accurate to one second every thousand years.


In 2010, founder Richard Hoptroff started Hoptroff London to develop smart, hyper-accurate watch movements to create a new watch brand. 

In 2012, Hoptroff London added Bluetooth Low Energy to their movements, allowing them to be configured from a mobile phone, and allowing them to display internet-connected information.

On 27th April 2013, the first atomic timepiece started ticking in London, establishing atomics as a new category of time regulation devices in clocks and watches, alongside the pendulum, the balance spring and the quartz crystal.

In 2015, Hoptroff London succeeded in being the first watchmaker to achieve better than one second per year accuracy in its quartz watches.

High Accuracy

Hoptroff London’s atomic timepieces use Chip Scale Atomic Clock technology developed by the United States Army. In each atomic physics unit is a small vessel of Caesium 133, an oven to heat it to 130°C, a laser to excite the atoms and a microwave resonator that resonates at the hyperfine transition frequency of the atoms, 16,546,737,186,000 vibrations per hour, with an accuracy of one 5 parts in 10-11. The resulting watch has an accuracy of one second every thousand years. The physics unit is not radioactive.

Hoptroff London’s quartz timepieces achieve accuracies of better than one second a year, which makes them the most accurate watches in the world apart from our atomic watches. The methods used are secret, but include aging the quartz crystals in an oven, and exact thermal calibration with reference to an atomic clock.

Founder Richard Hoptroff

Richard Hoptroff was awarded a PhD in Physics by King’s College London in 1992 for his work in optical computing and artificial intelligence.

In 1992, he founded Right Information Systems, a neural net forecasting software company which he sold to Cognos Inc (now part of IBM) in 1997. He then worked as a postdoc at the Research Laboratory for Archaeology and the History of Art at Oxford University, developing optically stimulated luminescence methods for dating the age of ancient buildings.

In 2001, Hoptroff created Flexipanel Ltd, a Bluetooth module company dedicated to supplying Bluetooth modules to the electronics industry.

In 2010, he founded the Hoptroff London watchmaking company.