Skip to content
The Encyclopedia of Horology

Pocket watch · Double-dialed pocket watch

B. Haas Jne & Cie Double-Dialed Pocket Watch

Partially verified

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.

Frontal view showing the two faces of the watch: the primary dial with moon phase (bottom) and the reverse dial displaying calendar functions (top).
Frontal view showing the two faces of the watch: the primary dial with moon phase (bottom) and the reverse dial displaying calendar functions (top). — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Pocket watch · Double-dialed pocket watch
Maker / attribution
B. Haas Jne & Cie
Reference
Not recorded
Catalogue / lot identifier
377
Source-reported date
circa 1890
Source-reported place
Genève - Paris
Source-reported serial
15025/4705

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

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.

Evidence for this section
  • “Three-body, bassine et filets, polished front cover with initials.”
  • “White enamel on the front with radial Roman numerals, outer minute track and Arabic five-minute numerals, subsidiary seconds, large inner moon phase aperture with lunar calendar on the edge.”
  • “Annular white enamel dial on the reverse with outer black Arabic chapter for the dates, inner days of the week, the center exposing the movement.”

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.

Evidence for this section
  • “M. 21''', nickel-plated, fausses cotes decoration, 18 jewels, counterpoised straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator.”

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.

Evidence for this section
  • “Attributed to B. Haas Jne & Cie, Genève - Paris, No. 15025/4705. Made circa 1890.”
  • “Grading System Grade: A Good Case: 3 Good Movement: 3* Good Overhaul recommended, at buyer's expense Dial: 3-25-71-01 Good Chipped ENAMEL AND VARIOUS TYPES OF DECORATION Hairlines”

Open research questions

  • What is the significance of the secondary '4705' serial number relative to the '15025' number?
  • Can the specific initials on the front cover be linked to a known historical owner of Haas watches?

Source evidence

Recorded claims and source quotations for B. Haas Jne & Cie Double-Dialed Pocket Watch
FieldSource-reported valueSource quotation
MakerB. Haas Jne & Cie“Attributed to B. Haas Jne & Cie, Genève - Paris”
Material18K pink gold“18K pink gold, double-dialed keyless pocket watch”
Serial Number15025/4705“No. 15025/4705”
Movement size21 ligne“M. 21'''”
Jewel count18 jewels“18 jewels”
Case styleBassine et filets“Three-body, bassine et filets”
EscapementCounterpoised straight-line lever“counterpoised straight-line lever escapement”
Datecirca 1890“Made circa 1890”

Visible details

  • Front cover displays personalized initials
  • Reverse dial allows visual access to the movement center
  • Front dial utilizes a subsidiary seconds sub-dial

Research qualifications

  • Condition report notes hairlines on the enamel dial
  • Attribution to B. Haas Jne & Cie remains an attribution only

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

Terms in this record

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