What is considered by many historians to be the earliest documented 'brand slogan' used by merchants in the ancient world?

Before modern marketing campaigns, ancient civilizations had their own ways of promoting products and services. Merchants and artisans developed distinctive phrases, symbols, and reputations to stand out in bustling marketplaces from Rome to Babylon. This trivia explores one of the earliest documented examples of what we might consider a 'brand slogan' - a phrase consistently used to identify a particular merchant or product in ancient times.

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"Genuine oils from Alexandria" - found on Roman amphora seals from 35 BCE
"Buy the goods of Ea-nasir" - found on Mesopotamian clay tablets from 1750 BCE
"The bringer of good things" - trademark of Umbricius Scaurus, fish sauce merchant in Pompeii around 35 CE
"Finest linen in all Egypt" - found on merchant seals from Ptolemaic Egypt, circa 250 BCE