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The Encyclopedia of Horology

Component · Warning wheel

Waterbury Clock Movement Warning Wheel (K6537)

Partially verified

This catalogued horological component is a brass-toned warning wheel removed from a solid back Waterbury clock movement. According to the seller, the source movement was stamped with patent dates spanning from May 24, 1910 through June 3, 1924, and marked as manufactured in the USA by the Waterbury Clock Company. The wheel features five open spokes, fine perimeter teeth, and an arbor. It is offered individually as a replacement part alongside reference measurement photography.

Waterbury clock warning wheel displayed beside a ruler
Waterbury clock warning wheel displayed beside a ruler — VintageClockParts.com. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
vintageclockparts.com
Category
Component · Warning wheel
Maker / attribution
Waterbury Clock Co.
Reference
K6537
Catalogue / lot identifier
K6537
Source-reported date
after June 3 1924
Country
United States

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

Component Identity and Visual Attributes

The catalogued item is offered as an "Old Solid Back Waterbury Clock Movement Warning Wheel". In the provided photograph, the component appears as a brass-toned metal gear displayed on a textured white surface next to a Fiskars wooden ruler.

Visual observations show that the wheel has five straight radial spokes extending from the central boss to the toothed rim. A small locating or stop pin projection is visible on the rim face between two spokes.

Evidence for this section
  • “Old Solid Back Waterbury Clock Movement Warning Wheel”
  • “Wheel features five straight radial spokes connecting the central boss to the toothed rim.”
  • “A small locating or stop pin projection is visible on the rim face between two spokes.”
  • “Brass-toned metal gear positioned on a textured white surface beside a Fiskars wooden ruler.”

Source Movement Context and Inscriptions

According to the seller, the wheel was sourced from a movement stamped "PAT'D May 24 1910, Jan 23 1917, Jan 29 1918, June 3 1924, Made in USA By Waterbury Clock Co".

The source text specifies that this text is stamped "in the center of the back pallet", meaning the inscription derives from the parent mechanism rather than being directly recorded on the wheel itself.

Evidence for this section
  • “The unit is stamped "PAT'D May 24 1910, Jan 23 1917, Jan 29 1918, June 3 1924, Made in USA By Waterbury Clock Co" in the center of the back pallet”

Reported Dimensions and Offering Scope

The seller reports that the source unit "measures 1 3/8 inches between pallets", provided to assist in identifying compatible mechanisms.

The listing explicitly cautions that movement photos are informational only, noting: "The last 3 pics are of the movement and are for reference only and are not included in the auction."

Evidence for this section
  • “measures 1 3/8 inches between pallets”
  • “The last 3 pics are of the movement and are for reference only and are not included in the auction.”

Open research questions

  • What are the precise tooth count, outer diameter, pinion leaf count, and arbor length for this specific wheel?
  • Does the seller's phrasing 'between pallets' refer to movement plates or pillar posts?
  • Which Waterbury movement model corresponds to the four patent dates ending June 3, 1924?

Source evidence

Recorded claims and source quotations for Waterbury Clock Movement Warning Wheel (K6537)
FieldSource-reported valueSource quotation
Listing ReferenceK6537“(K6537)”
MakerWaterbury Clock Co.“Made in USA By Waterbury Clock Co”
Patent Dates QuotedPAT'D May 24 1910, Jan 23 1917, Jan 29 1918, June 3 1924“The unit is stamped "PAT'D May 24 1910, Jan 23 1917, Jan 29 1918, June 3 1924, Made in USA By Waterbury Clock Co"”
Component TypeWarning Wheel“Old Solid Back Waterbury Clock Movement Warning Wheel”
Reported Measurement1 3/8 inches between pallets“measures 1 3/8 inches between pallets”
Source Stamp LocationCenter of the back pallet“in the center of the back pallet”

Visible details

  • Wheel features five straight radial spokes connecting the central boss to the toothed rim.
  • A small locating or stop pin projection is visible on the rim face between two spokes.
  • Brass-toned metal gear positioned on a textured white surface beside a Fiskars wooden ruler.

Research qualifications

  • The stamp and patent marks quoted in the description belong to the movement plates, not directly to this wheel.
  • The seller notes that reference movement photographs are not included with the sold component.

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

Consulted source

Old Solid Back Waterbury Clock Movement Warning Wheel (See Pics to ID) (K6537)

Reviewed 2026-10-21 · Record b6de2281f9

Terms in this record

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