1, check the watch dial and case: Longines watches will mark the model number on the dial and case. Look carefully at the dial and case of the watch, and you will find the logo of this model. The model consists of a series of letters and numbers, such as "L2. 128.4.87.6". You can record the found model and check the watch styles and information of the corresponding model in Longines official website.
2. Check the watch certificate: Longines watches will be accompanied by a certificate, which will indicate the model, production date, seller and warranty information of the watch. You can carefully check the information on the watch certificate and find the corresponding model. You can use the model number to check the details of related watches on official website.
3. Inquire at Longines Counter or official website: If you don't know the model of the watch, you can consult the sales staff or customer service at Longines Counter or official website. Providing photos, functions and other information of the watch is helpful to confirm the model of the watch and provide relevant information. You can also consult professionals, such as watch maintenance masters or appraisal agencies, who have more professional appraisal ability and experience and can help confirm the model of watches.