Claymo Master Tepponen Christian - Leningrad - initials CT

F.SClaymo Master of the Sukh Friedrich Eduard - Leningrad - initials of F.S.

К-ОClaymo Master Osipov K. - Leningrad - initials K-O

S-AClaymo Master Arnd Samuel - Leningrad - S-A initials

В.БClaymo Master Vasili Vasiljevic - Leningrad - initials of V.B. - end of 19 - early 20th century

F.BClaymo Master Berquist Elias - Leningrad - initials F.B.

МРClaymo Master Regelin Mathway - Leningrad - initials of the LL - 1841-1859.