assayer's mark is for Kliment Anikievich Zagaevski graduated from Gorny (Mountain) Institute, St.Petersburg in 1880. Worked in Vilno (now Vilnius, Lithuania) as the head of assay office since 1890, in 1910 he moved to Riga assay office. In 1896 assaying system was changed and from 1899 till 1908 (da...