Which mythological artifact was so effectively 'branded' through visual merchandising in ancient art that it became universally recognized as belonging to Zeus, even when depicted alone without the deity?

Throughout history, mythological tales have featured specific objects and artifacts that gained fame across cultures - essentially becoming the 'branded products' of their time. These mythical items were 'marketed' through oral tradition, art, and literature, creating lasting consumer recognition that spans millennia. Test your knowledge about these legendary 'products' and the visual merchandising techniques used to immortalize them in ancient storytelling.

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The Thunderbolt (Lightning Bolt)
The Golden Fleece
Excalibur
The Caduceus