Claymo Master Dors Johann Friedrich - Riga - initials of IFD
Similar hallmarks
EDClaymo Master Dobberman Efraim - Riga - ED initials
ГЮKleimo, unknown master Kiev, initials of the GJ, 1752.
ДТClaymo Master Tokmakov Dmitri Ivanov, with Red - initials of DT - 1898.
ИРIvan Gavrilov's Claymo Master of the Rookaviscnikov, initials of the IR
IFBThe stigma of the master Brandt Johann Friedrich - Riga - initials "IFB"
ГАThe stigma of the master Artemyev Gavril - Moscow - the initials "GA" - 1704-1746.