B. Haas Jne & Cie Double-Dialed Pocket Watch
Record status
Individual type · partial
Period
circa 1890
This 18K pink gold double-dialed keyless pocket watch is attributed to B. Haas Jne & Cie of Genève and Paris, dated to approximately 1890. The watch measures 51 mm in diameter and is housed in a three-body 'bassine et filets' case featuring a polished front cover engraved with initials.
The timepiece incorporates a complex multi-functional display. The front dial is white enamel with radial Roman numerals, an outer minute track, subsidiary seconds, and a central moon phase aperture featuring a lunar calendar. The reverse of the watch presents an annular white enamel dial indicating the dates and days of the week, with an open center exposing the movement. Internally, the nickel-plated 21''' movement is finished with fausses cotes decoration and includes 18 jewels.
Technical features include a counterpoised straight-line lever escapement, a cut bimetallic compensation balance, and a blued steel Breguet balance spring with an index regulator.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Date
- circa 1890
- Type
- Double-dialed pocket watch
- Maker
- B. Haas Jne & Cie
- Material
- 18K pink gold
- Case style
- Bassine et filets
- Escapement
- Counterpoised straight-line lever
- Jewel count
- 18 jewels
- Movement size
- 21 ligne
- Serial Number
- 15025/4705
- Place recorded
- Genève - Paris
- Maker / attribution
- B. Haas Jne & Cie
Design
- Visible features
- • Front cover displays personalized initials • Reverse dial allows visual access to the movement center • Front dial utilizes a subsidiary seconds sub-dial
- Movement and Mechanics
- The movement is a 21''' caliber nickel-plated mechanism. It features an aesthetic finish known as fausses cotes decoration. The mechanical architecture includes a counterpoised straight-line lever escapement, which serves as the regulating organ for the 18-jewel movement. Frequency stability is managed through a cut bimetallic compensation balance paired with a blued steel Breguet balance spring. An index regulator is present for precision time adjustment. The watch operates as a keyless winding system, facilitating manual adjustment of the calendar and moon phase functions associated with the secondary dial.
- Condition and Attribution
- The auction description reports that the object is in 'Good' condition, though specific flaws are noted. The white enamel dial is reported to exhibit hairlines. The auction documentation attributes the watch to the firm B. Haas Jne & Cie based in Genève and Paris, with production dated to approximately 1890. The grading system assigns a grade of A to the piece, while individual components such as the case and movement are graded as 3.
- Case and Dial Construction
- The watch is constructed in an 18K pink gold case of the 'bassine et filets' style, consisting of three parts. The front cover is polished and features initials. The watch employs a double-dialed configuration, a feature that distinguishes its display capabilities from standard pocket watches. The primary dial is composed of white enamel and displays time via radial Roman numerals with an outer minute track and Arabic five-minute markers. A subsidiary seconds dial is located at the bottom, while a large lunar aperture dominates the center, incorporating a lunar calendar along its periphery. The reverse of the piece features an annular white enamel dial for reading the date and the days of the week, designed with an open center to reveal the internal movement mechanism.
Identification
- Serial number
- 15025/4705
- 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.
Research required
- Research required: Condition report notes hairlines on the enamel dial
- Research required: Attribution to B. Haas Jne & Cie remains an attribution only