Edward John Dent Chronometer Age Determination
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Who was Edward John Dent?
- Edward John Dent (1790 – 1853) was one of the leading London chronometer makers .
- He manufactured marine chronometers, regulators, and fine pocket watches .
- His company supplied, among others, the Royal Navy and later built the clock mechanisms for Big Ben (Clock Tower) in Westminster.
The workshop names changed several times:
| Company name / Signature | Period | remark |
|---|---|---|
| Edward John Dent, London | ca. 1829 – 1840 | first independent period |
| Edward J. Dent & Co., 82 Strand, London | ca. 1840 – 1853 | Main phase |
| Dent & Co. London (after E. J. Dent) | from 1853 – ca. 1900 | Workshop under successors |
| Dent London Ltd. | 1900 onwards | Later industrial production and watches for colonial markets |
Serial numbers and production periods
E. J. Dent used a continuous serial numbering system for his clockworks.
The following table is based on archival information (e.g., Royal Observatory, Greenwich and D. R. Sobel Research):
| Serial number | Estimated year of construction | Notes |
|---|---|---|
| Nos. 1 – 300 | 1829 – 1835 | early pocket watches & marine chronometers, still "Edward John Dent London" |
| Nos. 301 – 800 | 1836 – 1845 | signed “E. J. Dent 82 Strand” |
| Nos. 801 – 1400 | 1845 – 1853 | Dent's last works before his death were mostly elaborate chronometers. |
| No. 1401 – 4000 | 1854 – 1880 | Manufactured by Dent & Co. (successor), very high-quality pocket watches |
| Nos. 4001 – 8000 | 1880 – ca. 1910 | Successor company Dent & Co. London, partly using raw materials from Nicole Nielsen |
| > 8000 | after 1910 | Later “Dent London” commercial productions, no longer direct workshop production. |
Dating via technical characteristics
| feature | Early phase (1829–1845) | Main phase (1845–1853) | Successors (1853–1900) |
|---|---|---|---|
| balance wheel | bimetallic, 12-spoke | finely slotted with gold screws | compensated screw balance |
| inhibition | Spring chronometer or duplex | chronometer-type detent escapement | Lever escapement in pocket watches |
| engraving | hand engraved “Edward John Dent London” | Machine-finished, fine "E. J. Dent 82 Strand" | “Dent & Co. London” (in block capitals) |
| Housing | solid gold / silver | 18K gold, 18k silver, often hallmarked multiple times | Stars, crowns, sometimes gold/nickel |
How to determine the year of manufacture
- Write down the serial number (usually on the mainplate or under the balance bridge).
- Read the label carefully (does it say "Edward John Dent London" or "Dent & Co. London"?).
-
Compare with the table above:
Example:
- Engraving: E. J. Dent 82 Strand London No. 512 → Year of manufacture approx. 1840.
- Engraving: Dent & Co. London No. 3113 → approx. 1860
Edward John Dent was born on August 19 , 1790 , the son of John Dent and his wife Elizabeth. He was baptized on October 18 at St. Clement Danes, Westminster. The boy's mother, Elizabeth, died young and was buried on May 16 , 1793 .
On August 20, 1804, young Edward began his apprenticeship with his grandfather, John Wright Dent, a tallow merchant, where he was trained as a wax chandler. John Wright Dent was supposed to find suitable accommodation for his apprentice, but instead, he was taken in by his cousin, the watchmaker Richard Rippon . Dent was fascinated by watchmaking and less interested in the manufacture and sale of candles. It was with Richard Rippon that he learned the basics of watchmaking. In fact, Dent became so interested in the watchmaking trade that on February 13 , 1807 , his grandfather agreed to transfer the remaining years of his seven-year apprenticeship as a tallow and candle seller to Edward Gaudin , a watchmaker in Clerkenwell. After completing his training, he returned to Rippon. From 1815 to 1830 , he worked for Benjamin Louis Vulliamy and Paul Philip Barraud , establishing a reputation as a maker of accurate chronometers. The demand for precision watches eventually led to orders from the Admiralty and the East India Company. He then resided at Strand 84.
From 1830, Dent was a partner of John Roger Arnold . Edward John Dent established his own business in London in 1840 ; his shop was located, among other places, at 33 & 34 Cockspur Street, Charing Cross (show this location) . Previously, Louis Recordon had operated there. He went on to own three watch shops in London: 61 Strand, 33 Cockspur Street, and 34 Royal Exchange.
Dent won the esteem of Sir George Biddell Airy , the Astronomer Royal, who praised him as the maker of a great Dent recommended a clock for the tower of the new Royal Exchange. He established a workshop at the Savoy to manufacture this superb clock, which was installed in 1844. In 1843, Dent married Elizabeth Rippon, widow of his cousin Richard Rippon, and her two sons , Frederick William and Richard Edward, became his stepsons.
Dent obtained numerous patents and wrote many technical papers, conducting research in the field of magnetic influences (glass balance wheel ). He manufactured pocket and marine chronometers , complicated pocket watches (some based on Swiss movements) , precision pendulum clocks , and tower clocks. In 1852, Dent won the commission, together with Edmund Beckett Denison , to produce the great clock—better known as Big Ben—for the Houses of Parliament in Westminster. He died in 1853 before completing the project.
His stepsons, Frederick and Richard, succeeded him in his business; Edward John Dent had divided his business interests between Frederick and Richard. Richard inherited the premises on Cockspur Street but died of a brain ailment in 1856. Frederick inherited the businesses on The Strand and at the Royal Exchange and completed work on the Big Ben clock in 1854. The brothers were required by Edward's will to use the family name Dent.
In his final years, he suffered greatly from illness, and finally contracted bronchitis, which he lacked the strength to fight. Edward John Dent died in London on March 8, 1853 , at the age of sixty-third, deeply mourned by a large circle of friends.
Source: Watchwiki, AI
