From the appearance, the trademark and brand handwriting marked on the dial and back cover of the genuine Longines watch are clear and complete; The number of drills marked on the dial is consistent with the actual number of drills of the movement; The material marked on the back cover is consistent with the material used in the case; Longines watch glass is bright and clear; The outer edges and corners of the case assembly have no sharp feeling; The coating has no bubbles and does not fall off. The trademarks and brands marked on the dial and back cover of counterfeit Longines watches are difficult to identify; The number of drills marked on the dial is inconsistent with the actual number of drills of the movement; The outer edges and corners of the shell assembly are rough, and the coating bubbles, falls off or the accessories are damaged.

2 Motion recognition

From the movement point of view, the splint or thallium in the genuine Longines watch movement is marked with the corresponding trademark mark; The motion is stable in the shell assembly; Clean the inside of the movement. There is no trademark logo on the splint or thallium of the counterfeit Longines watch movement, or the trademark logo is scrawled, blurred or skewed, or simply pasted with small copper sheets; The movement is not clean, and some movements contain copper chips, hair, fingerprints and so on.

3 Determination of sales price

The price of imported Longines watches is stable for a certain period of time. For example, Japanese brand watches cost 2500-3000 yuan; Longines watches of Swiss brands are all above 1000 yuan, and some famous-brand watches are as high as tens of thousands or even hundreds of thousands of yuan, such as Rolex, Tudor, Omega and Earl. Generally speaking, for imported watches below the above price, if there is no special reason, it is suspected that they are counterfeit imported watches or watches of improper origin.

4 Identification of inspection marks

When purchasing Longines watches, consumers should check the seller's commodity inspection certificate, and see whether the number on the laser forged mark is within the number range listed in the certificate. There are many other methods to identify authenticity, such as using detection instruments to detect gold content, travel time accuracy, waterproof performance, watch glass hardness, true and false diamonds and so on. Through the measured data to verify whether it is consistent with the data and instructions marked on imported watches, and judge the authenticity. In addition, some famous watches have special identification methods because of their movement structure and inherent special memory, but they need professional equipment and instruments for inspection.