Up until this year (2021) Louis Vuitton has used date codes in its bags since the early 80s. Please note these are not authenticity codes but identify where and when the bag was made and do contribute to assisting in the authentication process.
A0, A1, A2, AA, AAS (special order), AH, AN, AR, AS, BA, BJ, BU, CO, CT, CX, DR, DT, DU, ET, FL (also USA), LA (also USA), LM (also Spain), LW, MB,MI, ML,MM, NO,RA,RI,SA (also Italy), SD (also USA), SF, SK, SL, SN, SP, SR, TA, TH, TJ, TN, TR, TS, TY, VI, VX
BC (also Spain), BO, CE, FH (also USA), FO, FP, MA, NZ, OB, PL, RC, RE, SA (also France), TB, TD
BC (also Italy), CA, LO, LB, LM (also France), LW, GI, UB
FC, FH (also Italy), FL (also France), OS, SD (also France), TX
Louis Vuitton have now introduced micro chips to their bags which can be scanned in store
Two letter proceeded by four numbers. The first two letters represent the factory location and the first and third numbers represent the week of the year, and the second and fourth numbers represent the year,. For example FC1036 indicates that the bag was manufactured in the USA in the 13th week of 2006.
Two letters followed by four digits. The first two letters indicate the factory location and the first and third number represent the month and the second and fourth numbers the years. For example FA1015 indicate that the bag was made in Switzerland in Nov 2005.
Early to late 1980s
This was when Louis Vuitton changed their date codes to include the letters indicating the factory location where the bag had been manufactured. Usually three of four digits were followed by two letter. The first two numbers represented the year the next numbers the month and then in the late 80s the letters were first, for example BA8712 would mean that the bag had been manufactured in France in Dec 87.