Which ancient civilization first used standardized merchant seals that functioned similarly to modern logos for product authentication and merchant identification?

Before modern logos and brand identities, ancient civilizations had their own methods of distinguishing merchants and their wares. From potter's marks in Mesopotamia to distinctive shop signs in Rome, early retailers found creative ways to build recognition and trust. This poll explores how ancient civilizations approached what we now call 'branding' and how merchants established their identities in bustling ancient marketplaces.

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Ancient Egypt, where royal cartouches inspired merchants to create personal seals around 3000 BCE
Ancient Mesopotamia, where cylinder seals were used by merchants to mark clay containers and documents around 3500 BCE
Ancient Greece, where amphora makers stamped their distinctive marks on pottery around 800 BCE
Ancient Rome, where shopkeepers hung illustrated signboards (insignia) to identify their businesses around 500 BCE