I'd like to ask if the omega constellation number is 00 1 at last. What does that mean?

The serial number on the back shell of Omega watch is its production serial number.

Almost all Omega watches have production serial numbers, and they are one watch and one number, which is also unique. It is usually engraved on the back cover of the watch or the back of the watch shell. This is an 8-digit number. You can identify the authenticity of the watch by looking up the Omega watch number.

If it is a mechanical watch, the 8-digit production serial number will also appear on the edge of the movement splint, and the production serial number of the watch case is the same as that of the movement. The serial number of the real watch is engraved, which is very deep and clear. If it is engraved on the back cover of the watch, it will be consistent with the radian of the back cover of the watch, that is to say, the numbers are also arranged in an arc, while fake watches are generally horizontal.