The stigma of the master Blom Johann Genrik - Leningrad - initials "IHB"

ИРIvan Gavrilov's Claymo Master of the Rookaviscnikov, initials of the IR

ВККClaymo Master Kurduk Vassili Késariev, with the red initials of the VCC, the end of 19 - the beginning of 20th century

ВЕСClaymo Master of the Fortyin Vasiliy Efims, with the red initials of VES, 1898.

Ш-ИClaymo of an unknown master Leningrad - S-I initials - 1818-1844.

ТСClaymo Master Smirnov Timofei Andreev is a der. Malanino is the TC initials of 1898.

НГKlemo, unknown master of Moscow, initials of the NG, 1832-1846.