Claymo Master Neyman Karl Gustave - Leningrad - initials GN

Neumann, Karl Gustav (born in St. Petersburg), studied under S.G. Konradi. In 1768, he became an apprentice, and in 1775, he became a master of the guild of gold and silver work. He was known until 1793. His hallmark is a rectangular shape with the initials "GN" depicted by two letters. Objects: cup, ERO. Shape: Rectangle. Metal: Gold and Silver.