Claymo of unknown master Riga - initials of S.T.V. - 1856.

GTBClaymo of unknown master Riga - GTB initials - 1879.

CRHKlemo Master Hermann Robert Hugo - Tartu - initials of CRH - 1853-1886.

К.ФClaymo Master Faberge Petr-Carl-Moscow - initials of C.F.

С.Т.Ф.Claymo of an unknown master of Kiev - initials of S.T.F. - the beginning of the 20th century

C-M-SClaymo Master of Steel Carl Magnus - Leningrad - initials of C-M-S - 1830-1849

JBHThe stigma of the master Hertz Johann Bernhard - Leningrad - initials "JBH"