Louis Vuitton handbags do not have serial numbers, but do have date codes stamped on interior tags or directly on the interior linings on post-1980 handbags, as of 2016. Use date codes to identify the manufacturing location and date a Louis Vuitton handbag was made.
The presence of date codes on Louis Vuitton items does not guarantee an item's authenticity, since counterfeiters often forge date codes on their items. Date codes on Louis Vuitton items are only one, of many, things you should check to guarantee the authenticity of an item.
Louis Vuitton handbags produced before 1980 do not have date codes printed inside. The date codes on Louis Vuitton handbags manufactured in the early 1980s consist only of the date of manufacture in a Year/Month format. Throughout the later 1980s, the date codes expanded to include the factory location in a Year/Month/Location format. Beginning in 1990, the dating format changed to Location/Year/Month.