Claymo Master Grachev Gavriel Petrovich - Leningrad - initials of GRACHIV - 1866-1873.
Similar hallmarks
ФАБЕРЖЕ СППЕТЕРБУРГЪ МОСКВА, ЛОНДОНЪMr. Faberge Petr-Carl-Leningrad, initials of "FABERGE STEERBURG MOSKWAE, LANDONJO"
МДМФ6Claymo Moscow coiny court of the USSR - 1956.
CMClaymo Master Mercz von Christof Friedrich - Leningrad - initials CM
ICClaymo Master Carlson Anders Johann - Leningrad - Initiators I.
МТClaymo Master of Tarasov Mihail Yakovlevic - Moscow - initials of the TMT - 1905-1914
A.RIDELClaymo Master Ridel A. Minsk - Initiators A.RIDEL - 1891