'Signet' in the Bible

"Your signet ring, cord, and the staff in your hand," she suggested. So he gave them to her, had sex with her, and she became pregnant by him. Then she got up and left. Later, she took off her shawl and put on her mourning clothes.

While they were bringing her out, she sent this message to her father-in-law: "I am pregnant by the man to whom these things belong. Furthermore," she added, "tell me to whom this signet ring, cord, and staff belongs."

Then Pharaoh removed his signet ring from his hand, placed it on Joseph's hand, had him clothed in fine linen garments, and placed a gold chain around his neck.