Which ancient product design innovation was specifically created to address counterfeiting concerns and featured unique identifying marks that couldn't be easily replicated?

The ancient world was filled with remarkable product designs that revolutionized daily life and commerce. From architectural marvels to everyday household items, ancient civilizations developed sophisticated products that sometimes remained unmatched for centuries. This poll tests your knowledge about a fascinating ancient product design innovation that transformed commerce and communication across multiple civilizations.

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Cylinder seals from Mesopotamia, which used intricate carved designs rolled onto clay to authenticate documents and merchandise
Egyptian papyrus scrolls with hieroglyphic watermarks that changed color when exposed to sunlight
Roman tessera hospitalis tokens that broke into unique interlocking pieces shared between merchant partners
Chinese oracle bones with hidden microtexts visible only when heated above specific temperatures