rolex gmt batman review|Rolex batgirl gmt For instance, a date code like "FL0041" would indicate that the product was manufactured in the USA (FL) in week 04 in 2001. Pre-1980. For vintage Louis Vuitton items produced before 1980, the date codes are slightly different. These earlier date codes often comprise three or four numbers, representing the month and year of production.Louis Vuitton date code is a combination of numbers and characters that allows you to identify where and when the item was made. Unlike Chanel bag serial number, for instance, LV date code is not unique and cannot be considered a serial number. Subscribe