The stamp is composed of two separate elements. It belongs to one of the Earls of Strathmore and Kinghorne. It could be Patrick Lyon, 3rd Earl (1643–1695); John Lyon, 4th Earl (1633-1712); John Lyon, 5th Earl (1696–1715); Charles Lyon, 6th Earl (c. 1699–1728); James Lyon, 7th Earl (c. 1702–1735); Thomas Lyon, 8th Earl (c. 1702–1735); or John Bowes, 9th Earl (1737-1796). The “G” in the stamp probably signifies “Glamis” [i.e Glamis Castle] the ancestral home of the Bowes-Lyon family.