Depending on the year with the bag, Each individual Hermès could have a singular day stamp using a letter accompanied by both a circle, a square, or no shape dependant upon the calendar year it had been made. For your reference, we have integrated a chart of Hermès day stamps https://shoprareandlimitededition59257.full-design.com/considerations-to-know-about-authentic-hermes-bags-online-77562446