"The bottle is crowned with the letter K like a signet [ˈsɪɡnɪt] representing the majesty of the wearer." — MuseArabia.net, 20 Aug. 2023

signet [ˈsɪɡnɪt]
noun

Signet refers to a seal used officially to give personal authority to a document in lieu of (in place of) a signature, or to the impression made by or as if by such a seal.

Signets have been used for thousands of years. The design of a signet is personalized for its owner, and no two are alike. The ancients used signets to mark their possessions and to sign contracts.

In later years signets were used to stamp a blob of hot wax sealing a folded secret document

English