'Signet' in the Bible

He said, "What pledge will I give you?" She said, "Your signet and your cord, and your staff that is in your hand." He gave them to her, and came in to her, and she conceived by him.

When she was brought forth, she sent to her father-in-law, saying, "By the man, whose these are, I am with child." She also said, "Please discern whose are these -- the signet, and the cords, and the staff."

Pharaoh took off his signet ring from his hand, and put it on Joseph's hand, and arrayed him in robes of fine linen, and put a gold chain about his neck,