Claymo Master of the Red Alexei - Kaluga - initials A - 1845-1852.

АРMr. Rasadin Alexander Konstantinov, c. Red - Initiators A - 1898

АЗClaymo Master of Zots Arkady Osipov - with Red - initials of AZ - 1897

АСClaymo Master Smirnov Alexei, c. Red - Initiators AS - 1898.

ИБClaymo Master Baldine Ivan Vasiliev - Sidorovsky - Initiators of IB - the beginning of the 20th century

ОАClaymo, unknown master Ordzhonikidze, initials of OA 1886-1896.

А.БClaymo Master Belov Alexander Dmitrijevic - Moscow - initials A.B. - 1907-1913.