russian imperial hallmarks

  1. J.O maker's mark of Johan Ferdinand Olsonius (Grachev's Firm)/Именник J.O Иогана Фердинанда Ольсониуса (фирма Грачева)

    Johan Ferdinand Olsonius was born in 1823 in Finland. He studied in St. Petersburg, in 1842 he became an apprentice, and in 1852 a master of jewelry; worked for Grachev's firm. Died in 1888. Grachev's firm was founded in 1866 by Gavriil Petrovich Grachev, the business was continued by his sons...
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