I do collect pocket watches and I seen a number with cases by the Thickbroom family whose details appear in the work by Loomes, B. (2006). “Watchmakers and Clockmakers of the World”, N.A.G. Press, London.
By the mid to third quarter of the 19th century, when this case was made as my colleague, Jeff, correctly states, the UK watch-making industry had defaulted to Switzerland and its clockmaking business to the United States.
This case maker operating from 1832-1875 out of premises at 10 Galway Street, London
6 Spencer Street, Clerkenwell, London latterly with his brother James.
Alford and James Thickbroom was from a family of watch case makers. The company was founded by George Thickbroom (1774-1837), who first entered a sponsor’s mark at the London Assay Office on 29 March 1819.
"In February 1832, James Thickbroom entered a mark “JT” incuse with no surround at the London Assay Office as a pendant maker, 10 Galway Street, Clerkenwell.
On 16 August 1837, George Thickbroom, Alford Thickbroom, and James Thickbroom, carrying on business under the firm of George Thickbroom and Son [sic], of No. 10, Galway-street, St. Luke’s, Watch-case-Makers, declared that they mutually agree to dissolve their partnership. It seems likely that George Thickbroom retired and Alford and James Thickbroom continued in partnership.
On 30 October 1837, Jane Thickbroom entered a mark “JT” incuse with no surround at the London Assay Office. This mark was entered next to George Thickbroom with the address 10 Wellington Street Clerkenwell. George Thickbroom died around this time, in early October, which must have some bearing on the entry.
On 4 May 1843, Alford Thickbroom and James Thickbroom, carrying on business under the style and name of A. and J. Thickbroom, Watch Case Makers, No. 10, Galway-street, Saint Luke’s, agreed to dissolve their partnership.
On 19 May 1844 an incuse sponsor’s mark JT over JH was entered at the London Assay Office by James Thickbroom and Joseph Hirst at 10 Galway Street, Clerkenwell. The partnership, then at 12, Skinner Street, Clerkenwell, was dissolved in December 1845.
On 31 December 1845, James Thickbroom entered a mark of the letters J and T in cameo with individual surrounds at the London Assay Office as a pendant maker, 10 Galway Street, Clerkenwell.
James Thickbroom died in 1867 and his business was taken over by his nephew, Joseph.
In 1881, George J. Thickbroom advertised that he was successor to Alford Thickbroom, Silver Watch Case Maker, 6, Spencer Street, Goswell Road, London.
George J. Thickbroom retired in 1889 and the business was taken over by Fred Thoms, Watch Case Maker, 41, Spencer Street, London."
If you open the case up you may find the watchmakers name and the Swiss Canton where it was made. If there is not ready identification if you post a picture we can probably identify it for you. But the Swiss had also broken up their watchmaking into specialized parts.
Henry Ford is crediting with the 20th century invention of the assembly line but really it was the watch and clock makers who came up with the idea of moving the watches through the specialized makers premises and each artisan adding his bit. So a Swiss maker, with about six exceptions — names you will be familiar with perhaps even today – is really an assembly maker or sponsor as the silver trade calls it.
The completed works would have been shipped to London,Paris or Rome where it would have been cased, hands added and the face work completed to the specifications of the customer if a bespoke order. Cases are either gold, anything from nine to 18 ct. or silver, nearly always ,925 in my experience, depending on the requirements of the buyer.
He would have worn it in his vest or waistcoat pocket with an Albert (For Victoria’s husband) chain and on the end of the chain might be a sovereign case or a letter wax seal.
Watch sales were made through the commercial premises of John and Charles Turner, Jewellers to Her Majesty. Their premises were 58-59 New Bond St, London.
https://www.britishmuseum.org/collection/term/BIOG80364
Ref: John Culme, ‘The Directory of Gold & Silversmiths 1838-1914’, Woodbridge 1987
CRWW