Waltham 1892 Astronomical Sidereal Dial Pocket Watch

Technical characteristics

Type

Calendar & astronomical watch

Dimensions

58mm wide x 20mm deep

Jewel Count

19 Jewels

Case Engraving

TS.2292

Dial Signature

Waltham, Sidereal

Movement Model

1892 grade

Place recorded

United States

Maker / attribution

Waltham

Movement Serial Number

18028559

Design

Visible features

• White enamel dial featuring a 24-hour track with Arabic numerals and an outer minute track. • Subsidiary seconds register positioned at the lower dial above the 12-hour numeral marker. • Blued steel spade hour hand and slender minute hand. • Bezel features fine coin-edge knurling surrounding a bevelled crystal. • Top bow with onion-style winding crown at the 24-hour position.

Dial and Visual Presentation

The pocket watch displays a white enamel dial marked with a continuous 24-hour track of Arabic numerals and an outer minute circle. The dial is signed 'Waltham, Sidereal' and displays blued steel hands, comprising a spade hour hand and a slender minute hand. A subsidiary seconds register is situated in the lower portion of the dial directly above the 12-hour marker. The dial is housed under a bevelled mineral glass, encircled by a screw bezel bearing fine coin-edge knurling. The seller listing notes the presence of a small hairline crack situated between the 6 and 7 numeral positions, though the dial is otherwise presented in an open-face configuration with an onion-style crown and bow positioned at the 24-hour mark.

Case Architecture and Markings

The timepiece is fitted in an open-face case constructed from an unidentified white metal, measuring 58 mm in diameter by 20 mm in depth. According to the seller's documentation, access to the movement is provided via a screw-off bezel allowing the mechanism to swing out of the case body. The external surface of the case exhibits a smooth plain finish described by the dealer as having light marks and scratches. The exterior of the back cover is recorded by the vendor as being engraved with 'TS.2292', the institutional or personal origin of which is not documented in the source record.

Reported Movement and Astronomical Configuration

The movement is not directly visible in the record photograph but is reported by the dealer as an 18-size, 19-jewel Waltham Model 1892 full-plate nickel calibre bearing serial number 18028559. It is described as stem-wound and lever-set, featuring damascening, a lever escapement, gold train wheels, large gold jewel settings, and a micrometer regulator set with a diamond endstone. The calibre is described as configured for astronomical sidereal tracking. The dealer notes that the mechanism incorporates modified motion work under the dial to operate a true 24-hour dial and runs approximately 4 minutes faster per day relative to solar time. Waltham is stated in the listing to have produced 325 units of these watches.

Identification

Serial number

18028559

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.