the first three digits of the case number are the movement numbers, such as 129 and 152. You can find out which type of movement they use through the technical manual of the radar watch (note: 152 is ETA256.111 and 129 is ETA 956.412), and it also includes the battery model they use.
the four digits in the middle section are the number of the watch case style, while the last digit indicates the material of the watch case. 2 stands for electroplated case (gold or nickel plating), 3 stands for wear-resistant material on the case, (tungsten steel), 4 stands for stainless steel or bimetallic material, and 6 stands for K gold material.
radar watches also have numbers under 6 o'clock on the dial, and that's the dial number. The dial number is 3 digits, in which the first digit is the strap material and the last two digits are the color or technology of the dial. The specific meanings of the last two digits are as follows: 1-9 or 64-69 dial is white, 1-14 dial is gray, 15-19 dial is black, 2-24 dial is blue, 25-29 dial is yellow (gold), 3-69 dial is special color or synthetic sapphire dial, 7-79 dial with natural diamonds, 9.
Fake radar watches or modified radar watches don't follow the rules of this meaning. The production serial number of fake radar watches is very large, which is not 8 digits. (The production serial numbers of OMEGA, LONGINES and RADO watches are all 8 digits.) Among them, the number 1372811523769 is the most used. Moreover, both men's watches and women's watches use this number in automatic Shi Ying. It seems that the mold of the back cover of this fake watch is quite efficient.
note: the dial of a fake radar watch often does not print the dial number, even if the dial number is printed, it will not conform to the rules, and the serial number of the case is not stamped, but engraved.