Claymo Master Mering Johann Friedrich - Leningrad - IFMR initials

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

HALKlemo Master Long Henry August - Leningrad - initials of HAL.

E-L-MClaymo of an unknown master Leningrad - E-L-M initials 1780-1782.

FWClaymo Master Wennerström Olof Frederick - Leningrad - initials FW

I.R.S.The stigma of the unknown master of Leningrad - the initials "I.R.S."- 1839

HMThe stigma of the master Markovich Hirsch - Tallinn - initials "HM" - 1920-1940.