Which ancient civilization first developed the concept of 'brand sealing' - stamping products with distinctive maker's marks to guarantee authenticity and quality?

Throughout history, ancient civilizations developed sophisticated approaches to commerce and product positioning. From the bustling markets of Mesopotamia to the trade networks of Rome, these early societies created lasting retail innovations and branding techniques. This trivia challenge explores how ancient merchants positioned their goods and influenced consumer behavior through methods that still resonate in modern marketing.

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Mesopotamia (with cylinder seals used by merchants to mark clay containers)
Ancient Egypt (with hieroglyphic cartouches on luxury goods)
Classical Greece (with potter signatures on ceramic vessels)
Indus Valley (with stamp seals on trade goods)