More details needed please?   What sort of item are we talking about...clothing, handbags or whatever????????

Just as a general guideline, have a look at the manufacturers wibsite and see if it gives you any clues.

Hi

If you need authentication of your LV I would suggest "the purse forum" ( google it for the link) or US ebay boards, there is a specific category there for brand name handbags/shoes etc. Failing that etinceler.com are excellent authenticators.

Best wishes.