Breguet yellow gold perpetual calendar openface pocket watch

Technical characteristics

Dial

Silvered guilloché engraved

Type

Perpetual calendar openface pocket watch

Circa

1990

Movement

Manual, keyless

Functions

Moon phases, Perpetual Calendar, Leap Year

Case Diameter

48 mm. diam.

Case Material

18K gold

Place recorded

Switzerland

Maker / attribution

Breguet

Design

Visible features

• Moon phase aperture situated beneath XII featuring a gold-toned moon and stars against a blue disc. • Subsidiary dials located at 9 o'clock for the date, 3 o'clock for the day of the week, and 6 o'clock for a 4-year perpetual calendar cycle. • Blued steel Breguet-style hands for hours and minutes, with blued subsidiary hands. • Engine-turned guilloché silvered dial plate with a brushed hour ring bearing Roman numerals. • Round bow and pendant positioned at 12 o'clock on the gold case.

Case and Dial Configuration

The 18K gold case measures 48 mm in diameter and is described as featuring a coin-edge band alongside visible elements including a round bow and pendant positioned at 12 o'clock. The condition report noted minor surface wear with crisp engravings on the case, alongside an overall evaluation of very good. The dial is catalogued as silvered guilloché engraved, with visible engine-turned patterning and a brushed hour ring carrying Roman numerals. The layout features blued steel Breguet-style hands, a moon phase aperture positioned beneath 12 o'clock showing a gold-toned moon and stars against a blue disc, and three subsidiary dials indicating the date at 9 o'clock, the day of the week at 3 o'clock, and a 4-year perpetual calendar leap year cycle at 6 o'clock.

Mechanism and Source Limitations

The pocket watch is fitted with a manual-winding, keyless movement providing moon phases, perpetual calendar, and leap year functions. The specialist condition report indicated the movement was in working order at the time of cataloguing but had not been tested for accuracy, recommending a service. Interior components of the watch are not visible in the provided auction documentation or photograph. Information regarding the internal movement calibre, jewel count, serial numbers, and cuvette or caseback stampings is not recorded in this source.

Identity and Reference Discrepancy

Catalogued under the title designation reference 1800BA, this openface perpetual calendar pocket watch in 18K gold is assigned an estimated production period circa 1990. The cataloguer notes that it was consigned by the original owner and accompanied by a certificate of origin dated 29.12.1999, purchase receipt, product literature, and a leather folder. There is an unresolved contradiction in the cataloguing records concerning the model reference. While the auction lot title records the reference as 1800BA, the lot essay specifically designates the timepiece as reference 3747. Neither movement nor interior case engravings are provided in the source to determine which reference number is stamped on the physical object.

Identification

Reference

1800BA

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.