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The Encyclopedia of Horology

Pocket watch · Open-face pocket watch

English lever reversing pinion pocket watch with dial

Partially verified

This open-face pocket watch features a white dial inscribed 'S. FAGOT / TREHARRIS / ENGLISH LEVER' with bold black Roman numerals and a sunken subsidiary seconds register at 6 o'clock. The Science Museum Group records the movement as numbered 509148 with an English lever reversing pinion design. The watch is housed in a silver case hallmarked for Chester in 1900, signed 'TPH' and numbered 496388. It measures 19 mm by 54 mm and includes an accompanying winding key attached to the bow.

English lever reversing pinion pocket watch with dial and attached winding key
English lever reversing pinion pocket watch with dial and attached winding key — Science Museum Group. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
collection.sciencemuseumgroup.org.uk
Category
Pocket watch · Open-face pocket watch
Maker / attribution
S. Fagot
Reference
Not recorded
Catalogue / lot identifier
2001-665
Source-reported date
1900
Source-reported place
United Kingdom
Source-reported serial
509148

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

Visual Description and Dial Layout

The pocket watch is configured in an open-face style with a white dial displaying bold Roman numeral hour indices and an outer minute track. The primary time is tracked with blued steel hands, accompanied by a sunken subsidiary seconds dial positioned at the 6 o'clock mark.

The museum record catalogues the dial as signed 'S. Fagot, Treharris'. The watch is fitted in a silver case showing visible wear along the bezel and reeded edge, with a metal winding key tied to the pendant bow by a length of thread.

Evidence for this section
  • “White dial with bold Roman numeral hour indices and an outer minute track”
  • “Blued steel hands and a sunken subsidiary seconds dial positioned at 6 o'clock”
  • “signed S. Fagot, Treharris, on dial”
  • “Silver case showing wear along the bezel and reeded edge”
  • “Metal winding key tied with thread to the pendant bow”

Case Markings and Physical Dimensions

Museum records document the watch as housed in a silver case hallmarked for Chester in 1900. Internally, the case is recorded as signed 'TPH' and numbered 496388.

The catalogued measurements indicate dimensions of 19 x 54 mm. While external wear is visible in front view, the specific Chester hallmarks and case sponsor initials are not directly visible in the dial-facing photograph and are recorded from museum data.

Evidence for this section
  • “in silver case hallmarked Chester 1900”
  • “signed TPH and numbered 496388”
  • “Measurements: 19 x 54 mm”

Movement Documentation and Materials

The institution documents the watch as an English lever reversing pinion pocket watch with sunk seconds dial, having a movement numbered 509148. Listed materials for the object comprise brass and silver.

Because the inner movement is not exposed in the collection photograph, internal specifications, finishing, and mechanical condition are not recorded in this source beyond the museum's summary description.

Evidence for this section
  • “English lever reversing pinion pocket watch with sunk seconds”
  • “movement numbered 509148”
  • “Materials: brass and silver”

Open research questions

  • Which casemaker corresponds to the 'TPH' sponsor mark registered at Chester around 1900?
  • Does the movement numbered 509148 bear signatures matching S. Fagot or an identifiable English movement maker?
  • What specific dimension corresponds to the 19 mm measurement (case thickness) versus the 54 mm measurement (diameter) in the museum record?

Source evidence

Recorded claims and source quotations for English lever reversing pinion pocket watch with dial
FieldSource-reported valueSource quotation
Dial inscriptionS. Fagot, Treharris“signed S. Fagot, Treharris, on dial”
Movement number509148“movement numbered 509148”
Case hallmarkChester 1900“in silver case hallmarked Chester 1900”
Case markingssigned TPH and numbered 496388“signed TPH and numbered 496388”
Object Number2001-665“Object Number: 2001-665”
Measurements19 x 54 mm“Measurements: 19 x 54 mm”
MaterialsBrass and silver“Materials: brass and silver”
CreditPierson, John“credit: Pierson, John”
Made locationTreharris and Chester“Made: 1900 in Treharris and Chester”
Winding accessoryWith winding key“with winding key”

Visible details

  • White dial with bold Roman numeral hour indices and an outer minute track
  • Blued steel hands and a sunken subsidiary seconds dial positioned at 6 o'clock
  • Silver case showing wear along the bezel and reeded edge
  • Metal winding key tied with thread to the pendant bow

Research qualifications

  • Internal movement is not visible in the photograph; movement number and reversing pinion details are source-reported
  • Case hallmarks and interior markings are unverified by the photograph and rely entirely on museum cataloguing

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

Consulted source

English lever reversing pinion pocket watch with dial | Science Museum Group Collection

Reviewed 2026-10-21 · Record 9125406f43

Terms in this record

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

Other open-face pocket watch records