Which ancient civilization created what's widely considered the oldest known consistently branded commercial product, using distinctive symbols to indicate quality and origin?

While modern product marketing may seem like a recent invention, ancient civilizations had sophisticated methods of branding and promoting their goods. From distinctive pottery marks in Mesopotamia to merchant seals in the Indus Valley, product identification has deep historical roots. This trivia question challenges your knowledge about the earliest documented example of consistent product branding in human history.

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Ancient Rome with state-certified 'SPQR' olive oil amphorae (100 BCE)
Ancient China with imperial-marked pottery from the Han Dynasty (200 BCE)
Mesopotamia with stamped bricks from Ur bearing royal seals (2250 BCE)
Ancient Egypt with marked wine jars from the Abydos tombs (3000 BCE)