Pocket watch · Half-quarter repeater pocket watch

Gold and enamel half-quarter repeater watch by Brockbanks

Partially verified

This gold pocket watch with half-quarter repeating was produced by Brockbanks in London and is hallmarked for 1812. The movement is signed 'Brockbanks London No 700' and features a jewelled mechanism with a spring detent escapement, a free-sprung helical balance spring, and a three-arm compensation balance with sliding weights clamped by tangential screws. Striking on two gongs, it is housed within a four-coloured gold hunter case adorned with chiselled floral ornament and engine turning, bearing maker's mark WM. The source reports an engine-turned gold dial finished with translucent red enamel, a grey-blue enamelled hour ring, and subsidiary seconds.

Movement view of the Brockbanks gold half-quarter repeater pocket watch in its opened hunter case — The Clockmakers' Museum/Clarissa Bruce © The Clockmakers’ Charity. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: collection.sciencemuseumgroup.org.uk
Category: Pocket watch · Half-quarter repeater pocket watch
Maker / attribution: Brockbanks
Reference: Not recorded
Catalogue / lot identifier: L2015-3352
Source-reported date: 1812
Country: United Kingdom
Source-reported serial: 700

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Identity and Provenance

This pocket watch is an 1812 London creation bearing the movement signature 'Brockbanks London No 700'. The movement is hallmarked for 1812, and the number 700 appears on both the movement and the inside of the case.

The watch previously formed part of the collection of the Reverend Henry Nelthropp, who later donated it to the museum of the Worshipful Company of Clockmakers. Within the collection, it is recorded under Clockmakers' Museum No. 440.

Evidence for this section

“Gold watch with half-quarter repeating by Brockbanks, London, 1812.”
“Signed 'Brockbanks London No 700' and hallmarked for 1812.”
“Formed part of the collection of the Reverend Henry Nelthropp, later donated by Nelthropp to the museum of Worshipful Company of Clockmakers. Clockmakers' Museum No. 440”

Case Construction and Decorative Work

The watch is housed in a four-coloured gold hunter case decorated with chiselled floral ornament. Opening the cover over the dial is achieved by moving a steel nib sideways.

The source describes the inner case as having complicated engine-turning and being hallmarked and stamped inside with maker's mark WM and the number 700. Direct photographic observation of the opened hunter case reveals a dual-hinged construction, polished inner surfaces, and fine engine-turned banding on the rims.

Evidence for this section

“The four-coloured gold hunter case has chiselled floral ornament (a steel nib moves sideways to open the cover over the dial).”
“The inner case has complicated engine-turning and is hallmarked and stamped on the inside with maker's mark WM, and the number 700.”
“Fine engine-turned banding visible on the case rims”

Dial and Movement Details

According to the source documentation, the gold dial possesses an engine-turned centre covered with translucent red enamel, an hour ring enamelled in grey-blue, a subsidiary seconds dial, and gold wavy hands. The dial itself is not visible in the provided movement-side photograph.

The movement features jewelling, a half-quarter repeater striking on two gongs, and a spring detent escapement fitted with a steel escape wheel. Visibly confirmed details include an engraved balance cock with a central endstone jewel, blued steel screws, and a three-arm compensation balance with sliding weights clamped by tangential screws, paired according to the source with a free-sprung helical spring.

Evidence for this section

“The gold dial has an engine-turned centre, covered with translucent red enamel, with an hour ring enamelled grey-blue and a subsidiary seconds dial. Gold wavy hands.”
“The jewelled movement has a spring detent escapement with steel escape wheel, free-sprung helical spring and three-arm compensation balance with sliding weights each clamped by two tangential screws. The half-quarter repeater strikes on two gongs.”
“Three-arm balance assembly with adjustable sliding weights and tangential clamping screws”

Open research questions

Which London casemaker corresponds to the maker's mark 'WM' stamped on the inner case?
What is the condition of the translucent red and grey-blue enamel dial, which is obscured in the movement-only photograph?
Are full images of the chiselled floral exterior and the dial preserved elsewhere in the Clockmakers' Museum collection archives?

Source evidence

Recorded claims and source quotations for Gold and enamel half-quarter repeater watch by Brockbanks
Field	Source-reported value	Source quotation
Maker	Brockbanks	“Gold and enamel half-quarter repeater watch by Brockbanks”
Date	1812	“Made: 1812 in London”
Movement Number	No 700	“Signed 'Brockbanks London No 700' and hallmarked for 1812.”
Escapement	Spring detent escapement	“The jewelled movement has a spring detent escapement with steel escape wheel”
Repeating Mechanism	Half-quarter repeater striking on two gongs	“The half-quarter repeater strikes on two gongs.”
Case Maker's Mark	WM	“maker's mark WM, and the number 700”
Dial Material and Decoration	Engine-turned gold with translucent red enamel and grey-blue hour ring	“The gold dial has an engine-turned centre, covered with translucent red enamel, with an hour ring enamelled grey-blue and a subsidiary seconds dial.”
Hands	Gold wavy hands	“Gold wavy hands.”
Balance Spring	Free-sprung helical spring	“free-sprung helical spring and three-arm compensation balance with sliding weights each clamped by two tangential screws”
Museum Inventory Number	Clockmakers' Museum No. 440	“Clockmakers' Museum No. 440”

Visible details

Open dual-hinged gold hunter case revealing the movement plate and inner polished case backs
Engraved balance cock fitted with a central endstone jewel over the balance assembly
Visible engraved script inscription including 'Brockbanks' and number '700' along the plate perimeter
Blued steel screws securing balance components and movement plate structures
Three-arm balance assembly with adjustable sliding weights and tangential clamping screws
Fine engine-turned banding visible on the case rims

Research qualifications

The dial and exterior floral case chasing are not visible in this photograph.
Mechanism details like the spring detent escapement and repeating gongs are largely obscured or internal.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Gold and enamel half-quarter repeater watch by Brockbanks | Science Museum Group Collection

Reviewed 2026-10-21 · Record eec49b9116

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Glossary explanations for terms named in this object’s record.