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The Encyclopedia of Horology

Wristwatch · Time-only wristwatch with co-axial escapement

Roger Smith Series 1 in pink gold, Number 1

Partially verified

According to interview text published by Phillips, this pink gold wristwatch is Lot 101, identified as the very first round-cased Series 1 produced to incorporate Roger W. Smith's scaled-down 4.5 mm single-wheel co-axial escapement developments introduced in 2015. Conceived as a time-only piece, the design features traditional British finishing elements cited by the watchmaker, including gilded plates and three-dimensional dial architecture. Visually, the watch displays an engine-turned dial, black Roman numerals, and an off-center subsidiary seconds dial.

Roger Smith Series 1 wristwatch in pink gold, Lot 101
Roger Smith Series 1 wristwatch in pink gold, Lot 101 — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Time-only wristwatch with co-axial escapement
Maker / attribution
Roger W. Smith
Reference
Not recorded
Catalogue / lot identifier
101
Source-reported date
Not established
Country
United Kingdom
Source-reported serial
1

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 timepiece is identified as Lot 101, described as the first Series 1 wristwatch to feature a round case and to incorporate the watchmaker's updated escapement developments.

The watchmaker characterizes this piece as the inaugural production of the reimagined Series 1 model, which follows the original rectangular-cased Series 1 that was limited to nine examples.

Evidence for this section
  • “Lot 101 - Roger Smith Series 1 in pink gold, the first of its kind”
  • “This particular watch is the very first Series 1 to have been produced and to contain my latest escapement developments.”
  • “one of these was a reimagined Series 1 with a round case and time only feature.”

Visual Construction

The watch is housed in a round pink gold case. The dial features an engine-turned finish and is signed 'R. W. SMITH'. It includes an off-center subsidiary seconds register positioned between 4 and 6 o'clock, with an outer chapter ring displaying black Roman numerals.

The watch is fitted with a textured dark leather strap.

Evidence for this section
  • “Round pink gold case paired with a textured dark leather strap”
  • “Light engine-turned dial featuring an off-center subsidiary seconds register between 4 and 6 o'clock”
  • “Outer chapter ring with black Roman numeral hour markers and dial signed 'R. W. SMITH'”

Mechanical Features and Finishing

The movement features a 4.5 mm escape wheel, an iteration developed in 2015 to improve efficiency and extend service intervals by reducing mainspring size.

The watchmaker describes the finishing style as an interpretation of British watchmaking. Visible architectural elements include gilded plates, screwed-in jewelled chatons, heat-treated screws, and three-dimensional dial and hand design.

Evidence for this section
  • “In 2015 I redesigned my movement to house a super light single wheel co-axial escapement”
  • “I scaled down the escapement to its current 4.5 mm escape wheel diameter”
  • “The gilded plates, screwed in jewelled chatons, heat-treated screws to a purple blue hue and the 3 dimensional architecture to the dial, hands and movement”

Open research questions

  • What is the specific date of manufacture for this piece?
  • Does the watch contain specific engraving confirming it as 'Number 1'?

Source evidence

Recorded claims and source quotations for Roger Smith Series 1 in pink gold, Number 1
FieldSource-reported valueSource quotation
Lot NumberLot 101“Lot 101 - Roger Smith Series 1 in pink gold, the first of its kind”
Case MaterialPink gold“Roger Smith Series 1 in pink gold, the first of its kind”
Design IterationRound case, time-only feature“reimagined Series 1 with a round case and time only feature.”
Escapement Diameter4.5 mm“I scaled down the escapement to its current 4.5 mm escape wheel diameter”
Piece IdentificationFirst Series 1 produced with latest escapement developments“This particular watch is the very first Series 1 to have been produced and to contain my latest escapement developments.”
Design IterationRound case, time-only“one of these was a reimagined Series 1 with a round case and time only feature.”

Visible details

  • Round pink gold case paired with a textured dark leather strap
  • Light engine-turned dial featuring an off-center subsidiary seconds register between 4 and 6 o'clock
  • Outer chapter ring with black Roman numeral hour markers and dial signed 'R. W. SMITH'

Research qualifications

  • Movement side and internal finishing details are discussed in the text but not visible in the supplied photograph
  • Exact production year for this specific piece is not explicitly stated in the text

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

Consulted source

Roger Smith On What It Means To Make British Watches

Reviewed 2026-10-22 · Record c08f18585c

Terms in this record

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