Service Registration & Documents | A. Lange & Söhne
The manual and guarantee binder for an A. Lange & Söhne watch comes embossed with the company’s logo.

Guarantee and the “History of your watch” booklet

The guarantee seal or the guarantee card can be found on the first page of the “History of Your Watch” booklet that comes with every A. Lange & Söhne watch. These form the basis of the international Lange guarantee. Additionally, the book allows maintenance to be documented by hand and can also be used, if desired, to record a change in owner as well as dedications.


A watch’s buckle being polished with a cotton cloth

Guarantee conditions

Our timepieces are made using quality materials by experts in their field with the demand for perfection typical of Lange. Every watch goes through rigorous inspection procedures before it leaves our manufactory. This means you can be sure that you are receiving a perfect product from us. We provide a two-year guarantee from the date of purchase on every Lange watch for material and manufacturing defects.

A watchmaker inspecting a Lange timepiece with a watchmaker’s magnifier

Guarantee for a third year

If you obtained your Lange watch from a boutique, you can claim an additional year’s guarantee. This guarantee from the boutique operator requires you to successfully register your Lange watch on our website.

A. Lange & Söhne guarantee book

Service and repair guarantee

After an overhaul or repair, the watch leaves the service in perfect condition. That’s why you receive another 24-month guarantee on all parts affected by the maintenance or repair.


Guarantee documents for a Lange timepiece on a white background

Guarantee documents and additional information

The guarantee seal or guarantee card can be found on the first page of the “History of Your Watch” booklet. More information on service, guarantee services and the certificate of authenticity can be found in our FAQ

Lange timepiece in a boutique setting

Replacement guarantee

In the event that the guarantee documents are lost, the condition of the watch in question must be examined before the guarantee documents are reissued. The watch must therefore be presented to our customer service. Guarantee documents can only be reissued for watches in mint condition (max. four years old) and only once per watch. Please consult an authorised Lange dealer or Lange boutique near you.

A. Lange & Söhne manufactory interior

Certificate of authenticity

To prove that a watch is a real A. Lange & Söhne, the service team can, on request, provide proof of origin for timepieces manufactured after 1990. For this certificate (for a charge), the timepiece must be sent to the manufactory in Glashütte, to a Lange boutique or to one of our service centres.