How do you tell how old your bottle of Guerlain parfume is?

To determine the age of your Guerlain perfume, check for a batch code printed on the bottle or box, which can indicate its production date. You can also look for specific bottle designs or labels that correspond to certain time periods. Additionally, researching the fragrance's release date or consulting fragrance databases may help pinpoint its age. If needed, contacting Guerlain customer service can provide further assistance.