Does bbags that are have the same year/color/style have same serial numbers?
Balenciaga bags have quite a few numbers inside the bag as well as on the paper cards. There's a Model number and Serial number for each style and those will be the same on each bag, but with additions added some seasons. So, yes the numbers are the same for the exact same bag.
If the bag has a metal plate on the interior tag then it will also include a dye batch number and color season code.
Fake bags also fake these numbers, but often get them wrong. If you need authentication help, try this thread, pictures always help: http://forum.purseblog.com/balenciaga-shopping/authenticate-this-balenciaga-73866.html
its the 2007 marine. thanks a bunch~