Jamieson, Fausset and Brown on Genesis 41:41

41. Pharaoh said, ... See, I have set thee over all the land--These words were preliminary to investiture with the insignia of office, which were these: the signet-ring, used for signing public documents, and its impression was more valid than the sign-manual of the king; the khelaat or dress of honor, a coat of finely wrought linen, or rather cotton, worn only by the highest personages; the gold necklace, a badge of rank, the plain or ornamental form of it indicating the degree of rank and dignity; the privilege of riding in a state carriage, the second chariot; and lastly--