Certificate of authenticity
Longines has meticulously recorded each of its watches' serial numbers since 1867. This means Longines is able to provide a service that is greatly appreciated amongst admirers of the brand the world over and is available only to watch owners who have had their timepiece for a certain amount of time.
To receive the information kept in the Longines archives concerning your watch by email, we ask that you provide us with the serial number (numerical characters, from 5 to 8 digits) that is engraved either on the back of the watch, on the inside of the case back, or on the movement itself. In the last two cases, you will have to open the watch or have it opened by a watchmaker. High-quality photographs of your watch (dial, case back and, if possible, the inside of the case back and the movement) are essential.
Please note that Longines does not provide estimations of the current value of an antique watch. The value depends on fluctuations in the antiques market, the nature of supply and demand, the watch's state of preservation and operation, and many other criteria that require a specialist's opinion.
Information by email: 1 to 2 weeks.
Extract from the Archives: 2 to 3 weeks + shipping time
Certificate of Authenticity: 3 months + shipping time
If you own a Longines watch and wish to request one of these services, please contact us using the form on the www.longines.com website and choose the following reason for contacting us: “Historical information on a Longines watch”. Be sure to complete all the fields and indicate the nature of your request.