Pocket watch · Jump hour digital pocket watch

Haas Neveux & Cie Digital Perpetual Calendar Pocket Watch, Art Deco

Partially verified

This Haas Neveux & Cie pocket watch, serial number 20544, is a platinum-cased timekeeper manufactured circa 1900. The watch is defined by its digital display system, which indicates hours, minutes, days of the week, dates, and months through a series of apertures on the dial. The mechanism is a keyless, slim jump-hour movement, measuring 18''' and featuring 18 jewels, a straight-line lever escapement, and a cut bimetallic compensation balance with a blued steel flat balance spring. The movement is finished with fausses côtes decoration. The case is a three-piece, "bassine"-style construction in polished platinum. The dial is silver and matted, with the time and calendar information arranged in distinct sections. The piece is accompanied by an original fitted box.

Front view of the Haas Neveux & Cie platinum digital perpetual calendar watch and its movement. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: catalog.antiquorum.swiss
Category: Pocket watch · Jump hour digital pocket watch
Maker / attribution: Haas Neveux & Cie
Reference: Not recorded
Catalogue / lot identifier: 57
Source-reported date: circa 1900
Source-reported place: Switzerland
Source-reported serial: 20544

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 Configuration

The watch is housed in a three-piece, "bassine"-shaped platinum case, which has been polished. The back of the case is monogrammed. The overall thickness of the piece is 7.5 mm, reflecting a slim profile for a complex complication.

The dial is composed of a matted silver surface containing several discrete apertures for the digital display. The days of the week, dates, and months are presented through individual windows at the top. Below this, a semi-circular aperture indicates the minutes. The current hour is shown through a separate jump-hour aperture located at the lower portion of the dial.

Evidence for this section

“Three-piece, "bassine" polished, monogrammed back.”
“Silver, matted, eccentric jump hour aperture at the lower part, above aperture for Arabic digital minutes, above that an apertures for digital days of the week, date and months.”
“THICKNESS 7.5 mm.”

Movement and Technical Specifications

The watch is powered by an 18-ligne movement featuring 18 jewels. It utilizes a straight-line lever escapement and a cut bimetallic compensation balance, which is paired with a blued steel flat balance spring. The movement bridges and plates feature a rhodium-plated finish with "fausses côtes" decoration.

The signature appears on both the dial and the case, with matching numbers on both the movement and the case.

Evidence for this section

“, rhodium-plated, "fausses côtes" decoration, 18 jewels, straight line lever escapement, cut bimetallic compensation balance with blued steel flat balance spring.”
“Signed on dial and case, same number on the movement and case.”
“Movement: 3-6* Good Slightly oxidized Overhaul recommended”

Provenance and Historical Context

This specific timepiece incorporates a digital perpetual calendar system, which the source states was introduced by Haas Neveux to a design by Robert Cart. The watch is distinguished by its combined display of calendar information and digital time.

Haas Neveux watches manufactured in platinum are noted as being rare. According to the provided information, the auction house has previously sold two other examples of this model, both within a small numeric range of the serial number identified for this item.

Evidence for this section

“Digital perpetual calendar watches were introduced by Haas to the design of ROBERT CART.”
“HAAS NEVEUX watches in platinum cases are rare.”
“Antiquorum has only ever sold 2 other examples, only 7 numbers away from this model.”

Open research questions

What is the specific nature of the collaboration between Haas Neveux & Cie and Robert Cart regarding the digital perpetual calendar mechanism?
Does internal documentation confirm the exact mechanism used for the jump-hour synchronization with the perpetual calendar wheels?

Source evidence

Recorded claims and source quotations for Haas Neveux & Cie Digital Perpetual Calendar Pocket Watch, Art Deco
Field	Source-reported value	Source quotation
Maker	Haas Neveux & Cie, Genève	“Haas Neveux & Cie, Genève”
Case Material	Platinum	“platinum and enamel keyless slim jump hour digital Art Deco dress watch”
Movement Serial	20544	“No. 20544”
Movement Finish	Rhodium-plated, fausses côtes	“rhodium-plated, "fausses côtes" decoration”
Escapement	Straight line lever	“straight line lever escapement”
Jewel Count	18	“18 jewels”
Dimensions	46 mm diameter, 7.5 mm thickness	“DIAM. 46 mm. THICKNESS 7.5 mm.”

Visible details

Apertures for digital day, date, and month displays are positioned in the upper portion of the dial.
A semi-circular arc aperture displays digital minutes.
The jump-hour indicator is located in an aperture at the bottom of the dial.
The bow is designed with an angular, geometric shape.

Research qualifications

The condition report suggests the movement is slightly oxidized and recommends an overhaul.
The source attributes the design of the digital perpetual calendar to Robert Cart without specifying the scope of this contribution.

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

Consulted source

HAAS NEVEUX DIGITAL PERPETUAL CALENDAR PLATINUM Haas Neveux & Cie, Genève, No. 20544. Made circa 1900. Very fine, rare and elegant platinum and enamel keyless slim jump hour digital Art Deco dress watch with digital perpetual calendar. Accompanied by the original fitted box.

Reviewed 2026-10-26 · Record 1f0ee69414

Terms in this record

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