Wristwatch · Digital-display wristwatch

A. Lange & Söhne Zeitwerk Reference 140.029

Partially verified

The A. Lange & Söhne Zeitwerk, reference 140.029, is a wristwatch featuring a mechanical digital display. Introduced in 2009, the design utilizes large jumping numerical disks for hours and minutes, inspired by the five-minute clock at the Semper Opera House in Dresden. The watch is constructed with a 41.9 mm white gold case and a black dial framed by a German silver bridge. It is powered by the manual-wind L043.1 caliber, which includes a patented constant-force escapement to regulate the energy required for the instantaneous disk jumps. Additional features include a power reserve indicator at 12 o'clock, a subsidiary seconds dial at 6 o'clock, and a sapphire crystal case back displaying the movement's hand-finished components, including gold chatons and blued screws. The watch is fitted with a black alligator leather strap and a white gold deployant buckle.

Front view of the A. Lange & Söhne Zeitwerk reference 140.029 showing the black dial, digital windows, and subsidiary seconds. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: zamanito.com
Category: Wristwatch · Digital-display wristwatch
Maker / attribution: A. Lange & Söhne
Reference: 140.029
Catalogue / lot identifier: Source URL identifies the listing
Source-reported date: circa 2009
Source-reported place: Germany

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

The watch features a 41.9 mm case crafted from 18k white gold. The black dial is arranged with a balanced layout, incorporating a German silver bridge that provides structure to the digital time displays. The hours are displayed through a large numerical window on the left, while the minutes are displayed in a corresponding window on the right.

Positioned at the 12 o'clock location is a power reserve indicator labeled with 'AB' and 'AUF', indicating the winding state. Directly below, centered at the 6 o'clock position, is a subsidiary dial for seconds. The overall design is inspired by the historical five-minute clock found at the Semper Opera House in Dresden.

Evidence for this section

“نمونه مورد نظر با رفرنس 140.029، متعلق به نسل اول این مدل است که در یک قاب ۴۱.۹ میلی‌متری از طلای ۱۸ عیار سفید عرضه شده است.”
“الهام‌بخش اصلی طراحی این ساعت، ساعت معروف پنج‌دقیقه‌ای در اپرای سمپر شهر درسدن است.”
“نشانگر ذخیره انرژی در موقعیت ساعت ۱۲ و ثانیه‌شمار کوچک در موقعیت ساعت ۶”

Movement and Mechanics

The timepiece is driven by the manual-wind caliber L043.1. A central technical feature is the patented constant-force escapement, which manages the energy distribution necessary to power the instantaneous jumping of the digital disks every minute. This mechanism is designed to ensure consistent energy delivery without compromising the overall timekeeping accuracy of the movement.

Through the sapphire crystal case back, the movement is visible. The decoration includes German silver plates, hand-engraved elements, gold chatons, and blued screws. These components reflect the finishing standards employed in the brand's Glashütte workshops.

Evidence for this section

“قلب تپنده این ساعت، یک مکانیزم گریز نیروی ثابت (Constant-force escapement) ثبت اختراع شده است”
“کالیبر دستی L043.1 از طریق قاب پشتی یاقوت کبود نمایان می‌شود.”
“صفحات نقره آلمانی پرداخت‌نشده، حکاکی‌های دستی، چاتون‌های طلا و پیچ‌های آبی‌رنگ، همگی نشان‌دهنده وسواس این برند در جزئیات فنی و زیبایی‌شناسی هستند.”

Provenance and Specifications

The watch is identified by the model reference 140.029 and is noted as belonging to the first generation of the Zeitwerk series. It is paired with a black alligator leather strap and secured with a white gold deployant buckle. The model was originally introduced to the market in 2009.

The provided technical specifications confirm the use of 18k white gold for the case construction and the inclusion of a constant-force mechanism as a key functional component. The information is based on secondary catalogue reporting and does not constitute an independent verification of the object's specific provenance or history.

Evidence for this section

“نمونه مورد نظر با رفرنس 140.029، متعلق به نسل اول این مدل است”
“در نهایت، این ساعت با بند چرم تمساح مشکی و قفل تاشوی طلای سفید عرضه می‌شود.”
“این اطلاعات و سابقه به منبع نسبت داده می‌شوند و تأیید مستقل اصالت یا کارکرد توسط زمانیتو نیستند.”

Open research questions

What is the specific production serial number for this individual instance of reference 140.029?
Does the accompanying documentation confirm the original purchase date or service history for this specific unit?

Source evidence

Recorded claims and source quotations for A. Lange & Söhne Zeitwerk Reference 140.029
Field	Source-reported value	Source quotation
Maker	A. Lange & Söhne	“A. Lange & Söhne”
Reference	140.029	“رفرنس 140.029”
Case Material	18k white gold	“طلای ۱۸ عیار سفید”
Case Diameter	41.9 mm	“۴۱.۹ میلی‌متر”
Movement	L043.1 manual caliber	“کالیبر دستی L043.1”
Strap	Black alligator leather	“بند چرم تمساح مشکی”
Release Date	2009	“در سال ۲۰۰۹ معرفی شد”

Visible details

Large jumping numeric windows for hours and minutes
Power reserve indicator marked AB/AUF
Subsidiary seconds dial at the 6 o'clock position
Exposed crown positioned at 2 o'clock

Research qualifications

The source provides general model information rather than a condition report for this specific unit
Verification of the specific serial number for this individual object is not provided in the source

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

Consulted source

ساعت مچی A.Lange & Söhne Zeitwerk مدل 140.029

Reviewed 2026-11-02 · Record da67b6cdb6

Terms in this record

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