Which ancient civilization first introduced a standardized retail payment system using pre-weighed precious metal rings that merchants could verify with scales at the point of purchase?

The ancient world was home to sophisticated commercial systems that laid the foundation for modern retail. From Mesopotamian clay tablets recording transactions to Roman shopping complexes, early civilizations developed remarkably advanced retail technologies and customer experiences. This poll explores how ancient merchants created innovative payment systems that revolutionized commerce in the cradle of civilization.

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Ancient Egypt, where temple authorities issued 'shat' rings of consistent weight around 2000 BCE
Indus Valley Civilization, where merchants used standardized 'pana' silver pieces at Mohenjo-daro markets
Minoan Crete, where palace administrators created bronze 'talents' specifically for marketplace transactions
Ancient China, where the Zhou Dynasty implemented standardized copper 'knife money' for retail exchanges