Frederick II of Prussia; On the lower half of an oval plaque: portrait bust of a man (Frederik II); a profile to the left within an inscription. Man has curly hair; with tail in which a bow. He is wearing a high-necked jacket with six closures and star-shaped decorations on the left chest. Man has headgear (stitch) under left arm. The entire portrait is made of mother-of-pearl. The background and back of the plaque are black. Reverse side inscription. Om and inscription gold colored.; Frederick II (King of Prussia); anonymous; Japan; 1775 - 1800; copper (metal); mother of pearl; lacquer (coating); lacquering; l 11.5 cm x w 8.8 cm x d 0.5 cm