2. Look at the workmanship of the watch. If the font and brand LOGO on the real watch are engraved on the back cover, it will be very clear, while the fake watch is rough and the font is blurred.
Longines watches are all sapphire crystal mirrors, which are very wear-resistant. This method can be used to identify whether they are sapphire mirrors or not, and the water drop test method can be used to identify them. Water drops will not be scattered on the sapphire mirror, nor will they leave water marks. Then the mirror of this watch is a sapphire mirror. On the contrary, when the water drops go up, they will disperse, which means they are not.
4. From the movement point of view, the splint or thallium in the genuine Longines watch movement is marked with the words of the corresponding trademark card, and the movement is stable in the case assembly and clean in 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, and the movement is unclean. Some movements contain copper sheets, hair and fingerprints.
When buying Longines watches, you should check the seller's commodity inspection certificate and whether the numbers on the laser forged mark are within the 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.
Extended data
First, Longines Watch Cleaning and Maintenance Skills
If the waterproof chain is dirty, you can clean it with a soft toothbrush, while the waterproof chain can clean the metal bracelet and waterproof shell with a toothbrush and soapy water, then rinse it with water and dry it with a soft cloth.
Locomotive exhaust is easy to cause fading, gold-plated peeling and so on. And air deposition, sweat, body dirt, etc. It will also stain the watch, especially the gold-plated part of the watch. If it is a leather watch, it will cause the belt to be moldy, produce odor or even break, so it is best to gently wipe it with a clean soft cloth after wearing the watch every time, especially in summer, which will make the maintenance effect of the watch better.
Second, how to maintain and clean Longines watches?
1. Clean the watch case with a special container for ultrasonic treatment.
2. Wash leather by hand with solvent. First, the reaction of leather to solvent is tested to ensure that leather will not fade or change its appearance. This treatment is suitable for many leathers.
The maintenance cycle of watches is usually once every 2 to 3 years. When maintaining the watch, disassemble all the entry parts, then wipe the movement with 120 gasoline, then clean other instruments in the watch with professional equipment, and finally oil and assemble.
References:
Baidu Encyclopedia-Longines Master Series Mechanical Watch