Charles Frodsham 18K Yellow Gold Duo-In-Uno Chronometer Pocket Watch No. 09792

Technical characteristics

Type

Deck chronometer pocket watch

Weight

approx. 200gr.

Caliber

Frosted gilded three-quarter plate chronometer movement, with duo-in-uno hairspring

Diameter

60mm

Case Number

09792

Place recorded

United Kingdom

Movement Number

09792

Maker / attribution

Charles Frodsham

Design

Visible features

• Silvered dial with black Roman numerals and an outer track with secondary 24-hour hour markings. • Blued steel hands including a spade hour hand, matching minute hand, and smaller pointers for registers. • Subsidiary dial for running seconds at 6 o'clock and an up/down indicator beneath 12 o'clock. • Dial signed across the center 'Chas Frodsham No 09792 AD Fmsz.' • Visible fluting on the winding crown with an arched suspension bow in yellow metal.

Identity and Dial Configuration

This timepiece is an open-faced chronometer pocket watch catalogued to Charles Frodsham circa 1918 under serial number 09792. The silvered dial features black Roman numerals, an outer track with secondary 24-hour hour markings, and blued steel hands including a spade hour hand, minute hand, and smaller pointers for registers. A subsidiary dial for running seconds is positioned at 6 o'clock, complemented by an up/down power reserve indicator beneath 12 o'clock. Across the center, the dial is signed 'Chas Frodsham No 09792 AD Fmsz.' The source notes explain that the 'AD Fmsz' cipher represents 'Anno Domini 1850' and was applied by the firm to mark its top-tier production.

Case Construction and Dimensions

The open-faced case is constructed in 18K yellow gold, measuring 60 mm in diameter with an approximate weight of 200 grams. Visible exterior features include fluting on the winding crown and an arched suspension bow in yellow metal. The cataloguer lists matching case and movement numbers as 09792, noting signature on the dial, case, and movement. The source condition report grades the case as '3-8 Good Slightly scratched.'

Reported Movement and Technical Characteristics

Internal movement characteristics are documented through the auctioneer's catalogue description rather than visible observation. The caliber is reported as a keyless, frosted gilded three-quarter plate chronometer movement featuring a detent escapement and a Duo-In-Uno hairspring. The movement plate is engraved: 'By Appointment to the King, Chas Frodsham, 27 South Molton St. London, No 09792, AD Fmsz.' The cataloguer grades the movement as '3* Good' with an overhaul recommended at the buyer's expense, and describes the hands as original.

Identification

Serial number

09792

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.