Claymo Master Timofev Nikifor - Moscow - initials of NT 1732-1750.

И-ЛClaymo Master Libman Ivan - Leningrad - I-L initials

И-МClaymo Master Mikhailov Ivan - Moscow - initials I-M - mid-century of the 18th century

ГГClaymo of an unknown master of Moscow - initials of the GG - 1,790.

Л-ЕKlemo Master Egorov Larion - Leningrad - initials L-E - 1865-1874.

М-КThe hallmark of the Moscow assayer - Mikhail Mikhailovich Karpinsky - initials "M-K" - 1800-1824.

М-КClaymo Master of Matvey Borisov - Moscow - initials of MK - 1805-1808.