Claymo Master Chewarzin Anton Mihailovich - Moscow - initials of AM-- 1853-1897.

А-МThe stigma of the master Mukhin Alexander Alekseev - Moscow - initials "AM"

ВНЧClaymo Master Chulkov Vasili Nikolayev - initials of the NIS - end of 19 - early 20th century

ПАClaymo Master of Americans Pavel Dmitrijevic - Moscow - initials of PA - after 1908.

W-SThe seal of the master Zengbush Friedrich Wilhelm - Leningrad - initials "W-S"

ННKlemo Master Nikitin Nikolai - Leningrad - initials of NN - 1845-1874.

ИФАKleimao Master Andreyev Ivan Fedorović - Moscow - initials of IFA - end of 19 - early 20th century