Skip to content
The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

A. Lange & Söhne 1815 Chronograph Reference 401.026

Partially verified

This A. Lange & Söhne 1815 Chronograph, reference 401.026, is an example from the first generation of this model series, introduced in 2004. Constructed with a white gold case, the watch is designed based on the architecture of the Datograph, modified by the removal of the outsized date display, resulting in a slimmer profile. The dial features a four-layer construction, including silver sub-dials and a printed pulsations scale on the perimeter, accompanied by blue steel hands and numeral indices. Powering the watch is the hand-wound caliber L951.0, which incorporates German silver plates, polished and bevelled steel levers, gold chatons, blue heat-treated screws, and a hand-engraved balance cock.

View of the A. Lange & Söhne 1815 Chronograph reference 401.026 on the wrist.
View of the A. Lange & Söhne 1815 Chronograph reference 401.026 on the wrist. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
A. Lange & Söhne
Reference
401.026
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
2004
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 timepiece is housed in a case manufactured from white gold. The design architecture draws directly from the manufacturer's Datograph model but differs by the exclusion of an outsized date display, allowing for a reduced case thickness and a classic aesthetic.

The dial utilizes a four-layer construction method. It incorporates silver sub-dials and features a printed pulsations scale positioned on the outer perimeter. The display is completed with blue-toned hands and clear numerical indices, intended for readability.

Evidence for this section
  • “قاب این ساعت طبق منبع از طلای سفید ساخته شده”
  • “صفحه ساعت از ساختار پیچیده چهارلایه بهره می‌برد که شامل زیرصفحه‌های متضاد از نقره خالص و مقیاس برجسته ضربان‌سنج (Pulsations scale) بر حاشیه است.”
  • “این مدل بر پایه معماری فنی و اصالت مدل مشهور Datograph طراحی شده، با این تفاوت ساختاری که در این نسخه نمایشگر تاریخ بزرگ حذف گردیده و به لطف این تغییر، ضخامت کلی قاب کاهش یافته و فرمی ظریف‌تر و کلاسیک‌تر به خود گرفته است.”

Movement and Escapement

The watch operates on the manually wound L951.0 caliber, described as a highly engineered movement. The movement finish includes plates fashioned from German silver and levers that are polished and bevelled.

Additional decorative elements of the caliber include a hand-engraved balance cock, functional gold chatons, and screws treated with heat to achieve a blue finish, which contributes to the visual depth of the movement.

Evidence for this section
  • “در قلب این قطعه، کالیبر اختصاصی L951.0 قرار دارد که به‌عنوان یکی از مهندسی‌شده‌ترین و چشمگیرترین موتورهای کرنوگراف شناخته می‌شود.”
  • “این موتور دستی با استفاده از پل‌هایی از جنس نقره آلمانی (German silver)، اهرم‌های فولادی پولیش و پخ‌خورده، خروسکی بالانس حکاکی‌شده با دست، شاتون‌های طلایی و پیچ‌های حرارت‌دیده آبی‌رنگ تزئین شده است”

Provenance and Documentation

This watch is identified as a first-generation model, with its introduction to the market occurring in 2004. The technical and operational information provided for this object is sourced from Hairspring notes.

No specific documentation regarding recent servicing or accompanying accessories is mentioned in the record. The provided information is reported based on the source's descriptions, and no independent assessment of the piece or its authenticity has been performed by the cataloguing body.

Evidence for this section
  • “این نمونه نسل اول از سال ۲۰۰۴ بوده”
  • “جزییاتی در خصوص سرویس‌های اخیر یا لوازم همراه به صراحت ثبت نشده است.”
  • “اطلاعات و مشخصات ارائه‌شده در این مدخل به طور مستقیم از یادداشت‌های منبع Hairspring اقتباس شده”

Open research questions

  • What are the exact case diameter and height dimensions for this specific reference?
  • Does the serial number on the case back match the movement serial number recorded in the manufacturer's archives?

Source evidence

Recorded claims and source quotations for A. Lange & Söhne 1815 Chronograph Reference 401.026
FieldSource-reported valueSource quotation
MakerA. Lange & Söhne“سازنده: A. Lange & Söhne”
Model1815 Chronograph (first generation)“مدل: 1815 Chronograph (نسل اول)”
Reference401.026“شماره رفرنس: 401.026”
Year of Introduction2004“سال تولید: ۲۰۰۴”
Case MaterialWhite gold“جنس قاب: طلای سفید”
CaliberL951.0“کالیبر: L951.0”
Movement FeaturesGerman silver plates, blue screws, gold chatons, hand engraving“تزئینات موتور: پل‌های نقره آلمانی، پیچ‌های آبی، شاتون طلا و حکاکی دستی”
FunctionalityFlyback chronograph, pulsometer“قابلیت‌ها: کرنوگراف فلای‌بک، ضربان‌سنج”

Visible details

  • Blue steel hands
  • Hand-engraved balance cock
  • Four-layer dial construction with pulsations scale
  • German silver movement plates

Research qualifications

  • Verification of recent service history is not provided
  • Specific case dimensions are not stated in the source

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

Consulted source

ساعت مچی کرنوگراف A. Lange & Söhne 1815 Chronograph رفرنس 401.026

Reviewed 2026-11-02 · Record 2032149972

Terms in this record

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

Other chronograph wristwatch records