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a unique c1760 experimental duplex regulator


A Unique C1760 Experimental Duplex Regulator

Status: This item has been sold
Sold by: Overton Clocks of Chesterfield ltd


At Overton Clocks, we pride ourselves in sourcing unique and unusual clocks and this clock is both.
This is a bespoke, very rare 18th century experimental regulator featuring a very early attempt at a duplex escapement, three rod grid iron pendulum, sweep second and sweep calendar works.
The 18th century was the era when great leaps forward were being made in the development of the clock. Household names such as Tompion, Graham and Hooke were creating inventions that revolutionised the art of time keeping. I am confident that behind every famous maker, There must have been many other behind them trying and experimenting with the ideas of the day. This clock is one of them.
Although this clock is unsigned, we can use the features of it to try and date it as close as possible and evaluate the inventions that are being developed.
The clock has an adaption of the duplex escapement invented by Hooke. It displays two escape wheels on the same arbor cut with "deadbeat" teeth and each wheel has it own pallet with a roller on the end of each. Hooke's invention was trying to develop a frictionless escapement and the introduction of rollers is an adaption of this. Due to these rollers and low friction, this clock runs very quietly indeed compared to the conventional longcase thud!
The pendulum with its 8 inch heavy lenticular bob has an interpretation of a grid iron arrangement. Harrison invented the grid iron pendulum around c1715 and this pendulum, although having an invar central rod and two outer brass rods, is not quite successful in it's final concept. Below the bob is a substantially made shaped bracket with three individual nuts that fit to each rod. This arrangement would not work in a compensating way but is a good attempt at solving the issue of thermal expansion.
The finned pillared movement is totally handmade, displaying plates that visibly vary in thickness and a dial that clearly is made the same way being thicker in the middle and thinner at the edges. Every wheel has been finished by hand to a good standard and the tooth form of each wheel is of an early straight form type. Along with the flame mahogany case with architectural top I would date this clock to the second half of the 18th century.
This clock is an example of the pioneering, forward thinking ideas of the industrial revolution engineers and is a unique snapshot of horological progression during this period.
To ensure piece of mind in your investment, I will personally deliver and set up this clock anywhere in the UK and if travel costs are met, I would be willing to travel outside the UK.
With over twenty years experience in restoring and conserving clocks and working on some of the finest and complicated clocks for a select group of the best antique clock dealers in the country, We are proud to say that we are now the exclusive restoration company for Steam Mill Clocks.
As well as this, Overton Clocks has now decided to offer our customers the opportunity to purchase fine antique clocks that have been personally selected for their unique or special features. Each clock has been expertly restored to the highest of standards by myself. Overton clocks ensures peace of mind in your investment, by personally offering three years warranty on all of our timepieces.
I am a master clockmaker, a Freeman of the Worshipful Company of Clockmakers and a member of the British watch and clockmakers guild. Overton Clocks is a traditional clock shop based in the heart of Chesterfield on two floors hosting a showroom and in-house fully equipped workshop.
For case studies and examples of our work, please see our website ( or find us on Facebook ( overtonclocks) for regular updates


This item is antique. The date of manufacture has been declared as 18th Century.


Height = 200 cm (78.7")
Width = 45 cm (17.7")
Depth = 20 cm (7.9")

Seller Details

Overton Clocks of Chesterfield ltd
United Kingdom

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