Which ancient civilization first used standardized clay seals as 'brand marks' on merchandise to indicate producer, quality level, and place of origin?

Before modern logos and brand identities, ancient civilizations had their own sophisticated methods of product differentiation and merchant recognition. From maker's marks on pottery to distinctive seals on goods, branding has ancient roots that might surprise you. Test your knowledge about how early civilizations approached what we now call retail branding, and discover how these practices influenced commerce across millennia.

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Mesopotamia (specifically during the Ur III period, circa 2100 BCE)
Ancient Egypt (during the New Kingdom period)
Indus Valley Civilization (Harappa and Mohenjo-daro)
Ancient China (early Zhou Dynasty)