19th century AD. A conical-shaped opaline glass seal with four chamfered triangular faces tapering to a point; a rectangular seal cartouche with nasta'liq calligraphy engraved in mirror reverse; lateral piercing; dated either 1218AH/1803 or 1263AH/1846; mounted on a custom-made stand. 54.3 grams total, 79mm including stand (3"). From the private collection of a London gentleman; acquired on the London art market; previously in the private collection of the late Oliver Hoare (1945-2018); Oliver Reginald Hoare, Princess Diana's art dealer, described as arguably the most influential dealer in the Islamic art world.